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Found 92 results

  1. This has been mentioned but never really discussed. A straight answer hasn't really been provided. I'm writing this for my Jaguar, but I think it has plenty of merit with our cars as well since many people install transmission coolers. There are 3 possible scenarios here. 1. Use the built-in transmission cooler in the radiator 2. Route the transmission cooler lines from the radiator, to the aux trans cooler, and back to the trans 3. Bypass the radiator and go straight to the aux trans cooler Obviously, we know that our transmissions heat up to the point where the stock radiator is not enough to cool them. Buck reported that under heavy driving, his 05 GTP's 4T65E-HD would hit 260 degrees F. We also know that heat kills transmissions, and that temperature is rather high. Therefore, it can be assumed that the stock radiator is insufficient in cooling the transmission. This is primarily because it cannot cool the transmission below what the temperature of the radiator is, which during a typical summer day will sit nicely around 190 degrees F. IIRC, our w-bodies won't switch on the primary fan until the temperature reaches 235 degrees F. Correct me if I'm wrong here. The transmission will only get hotter than that. If one routes the transmission cooler lines through the radiator and then to the aux trans cooler, the radiator does some slight bit of cooling, and the transmission cooler does the bulk of the cooling thereafter. In my experiences, with a large transmission cooler flush mounted to the condenser, the engine could be running at even 220 degrees F, and the transmission will stay steady at 190 degrees, so the cooler is obviously making a big difference. Obviously its less than ideal to flush mount the transmission cooler, and I'm working on that. My concern with this approach is that the transmission can potentially be cooler using only the aux transmission cooler, which brings me to my next point. How cold is too cold? I've read that someone called valvoline to ask them that question, and the response was flat out "30 degrees F." I'm not sure how much validity there is to that claim, since I've also heard from around here that you can run a transmission too cold. Well how cold is too cold? I don't want to hear guesses here, but rather constructive feedback. Would it be detrimental to bypass the radiator entirely and have the aux trans cooler take care of all of the cooling? Has anyone done this and reported back on their temperature readings in different conditions? Another thing to consider with this approach is that the car itself will run cooler as a result of not having the heat of the transmission lines going through it. In regard to the aux trans cooler, I'm referring heavy duty coolers in the $50-$60 range, built for RV's.
  2. My Bilstein Shocks are completely worn out after 80k miles and my rear tires are showing it. The cheapest I can find replacement Bilstein HD shocks are around 250 a piece, which is a bit steep. Can anyone find these shocks at a cheaper price, or the best alternative to them? I've looked the Bilstein non HD shock and KYB excel G shock and thats what I'm debating about using but all opinions are welcome.
  3. Heartbeat1991


    I am in the process of rebuilding Galen's TGP transmission. He had no 4th gear. After taking it apart, it's obvious why. The 4th gear clutch was all tore up. I never seen one like that before. But I don't have a lot of 4T60 experience either. The clutch material was gone. It was all metal to metal. The confusing part is that the clutch teeth were bent up pretty bad and the whole things seems to have been spinning in the outside of it's carrier. ( See pics ). I have yet to do much digging for parts. . .But, does anyone know if that clutch career is going to be ok to re-use? And what caused this? What else should I be looking for? It seems to me that something had to have been bound up to cause this. But I have no idea how.
  4. I have a 2000 Buick Century with the LG8 3.1L engine. I want to swap that for a 1997-2004 Buick Regal L67 3.8. I want to know is this possible, will it be a direct swap, and if it is possible will I have to swap my transmission to the 4T65E-HD?
  5. figured id do a how to thread. this how to will directly apply to 96-99 1st gen ws. will apply to 88-95 ws if doing complete obd2 swap at same time(some parts the 4t65 swap parts list are shared with the obd2 swap parts list). wondering why 4t65 swap? several reasons. newest interchangeable 4t60 was made in 1999, newest 4t65, 2002 so a lil more jy available. after i did the swap shifts seemed more solid and crisp(along with the knowledge that my lil 3400 would never kill it lol). if ur planning an l67 swap but are a brokeass (like me) it alows you to do half the swap at a time and when you actually get around to dropping in the 3800 its just an engine swap period. also the required pcm for the swap has the same gears as a 4t65hd programmed in it. PARTS LIST -4t65(duh) if you dont wanna do any programming get one with 2.93s ie 2000-01 lumina or 97-02 l67 anything -2000-01 lumina engine harness, also need plug from donor where harness plugs into drivers side underhood harness -2000-01 lumina pcm(still pk2 so no security issues) -97-99 z34, 98-99 ltz, or 2000-01 lumina trans cooling lines -if using non hd you can use cvs from 97-99 z34, 98-99 ltz, or 2000-01 lumina 98-99 monte, 98-01 lumina pcm tray is handy but not required but handy if using hd trans you can use the same d side cv as above but on pass side get the inner cv cup and swap onto your cars stock pass side cv another note if using hd trans-you MUST use a torque converter from an l36/l26 or 3x00 or it wont bolt to flywheel
  6. I have a 4t65hd and a 97 Monte Carlo wiring harness and ecu. I have heard that I can swap the wiring harness into my car but there is some repinning that needs to be done. I'm wondering what I have to do exactly to make the wiring and ecu work in my car. Thanks Sent from my MB886 using Tapatalk
  7. Curious if someone could help positively identify the trans I have as a 4T60HD. It was pulled from a 90 tgp,but i'm selling it and wanted to find some way to make myself feel better that it wasn't just a regular 4t60. Haven't been able to find any info for identification,the tag is unreadable except the stamping. Thanks for any help.
  8. vmax


    Been a lurker for a while and have a few questions... Broke down and started fixing my 90 gpt. Has 60k miles and is clean. Only thing bad is guy never flushed the cooling system ever... Im doing a gasket change...head intake ect...and cleaning everything up. Got the hd felpro head gaskets and a gasket kit. The valve seals are all one color in the kit,and the stock ones are different color. Exhaust ones are red?...intake are black. Whats the difference? Other thing...was dipping a set of valves to clean them.. Went to fish them out and could only get the intake valve(magnetic) Couldnt get the exhaust...non metalic?..stainless? I know its a factory motor...I know the guy who bought it from the dealership. Any info would be appreciated...I dont want to screw it up and its been a while since I'vw rebuilt a motor.
  9. I'm ordering a new PCS this week, rough shifts. At the same time I'll be doing the DIY shift kit from our FAQ section. It looks like the 1-2 & 3-4 Shift Solenoids are right there too, can somebody verify that from experience before I order them and find that they're buried deeper than I want to go? Also how's my parts list look? My parts list so far is: Medium Shift Kit: McMaster-Carr (2) 92415A865 :: Zinc-Plated Steel Unthreaded Round Spacer 1/2" OD, 1/2" Length, 1/4" Screw Size (2) 92415A867 :: Zinc-Plated Steel Unthreaded Round Spacer 1/2" OD, 3/4" Length, 1/4" Screw Size 2-3 shift accumulator spring GM part number 24203977 ($8.26 on WIX Filter Part # 58837 Includes pan gasket ($11.84 on RockAuto) 10 Quarts of Fluid Solenoid Replacement: ACDELCO Part # 10478146 VALVE,PRESS CONT SOL w/4-SPD AUTO TRANS ($35.89 on RockAuto) ACDELCO Part # 24219819 VALVE,1-2,3-4 SHFT SOL w/4-SPD AUTO TRANS ($17.86 X2 = $35.72 on RockAuto) FEL-PRO Part # TOS18723 17-bolt holes; GMC 4T65E-HD; 4 Speed ($20.89 on RockAuto)
  10. Anyone made the swap on a fifth generation Monte with the LQ1? My donor car would probably be a fifthgen GTP... Im still in school learning mechanics but can weld nicely and am not afraid of challenges. I wish to have a better, more durable transaxle for the car since my 4t-65e started slipping. I might also consider the whole swap from LQ1 to L67 as i feel my 3.4 is in good shape but imprisoned in a w-body, struggling to pull the enormous weight of the car. There is rather little space for upgrades under the hood (i hear that twin cam engines respond well to forced induction) with the power plant's positionning so maybe I ll buy a Fiero or Tracker to put the LQ1 to good use... Not sure yet Any advice or info would be gladly welcomed, Thanks in advance -Marc
  11. I've done some poking around about the DOHC 3.4L GM V-6 and I am baffled that there aren't more mods for it. I've read the story about how GM designed it to produce 275+ HP but it was limitations from the Hydra-matic division that de-tuned it to a 210hp engine. I believe this is complete hogwash. The Hydra-Matic division of GM had been building FWD transmissions since 1966, first for the Oldsmobile Toronado. It was a TH-425...kind of a TH-400 with the tail end bent sideways. It sat behind a HC Olds 425CID with 385HP and 480lb/ft of torque. Twenty-some years later they couldn't build one to even handle 210hp? Not only that... but over the entire production of this engine to 1997, HP only increased by 5? So, Hydra-Matic couldn't improve on their best FWD transmission to accept any more than 5 additional HP over another 6 years? 1994 saw the introduction of the supercharged 3800, capable of 225hp in front of a 4T60E HD. 1996 saw the introduction of the Series II Supercharged 3800 with 240hp. If the DOHC 3.4 was detuned so much, it certainly should have been unreigned by then! Still... after all these years, and all the potential of all that natural aspiration, there are so few mods? Swap it out or add turbo is about all I read. So, for the shadetree mechanic, what's there to do? -modified airbox -bigger TB -TB coolant bypass -exhaust - engine mount wishbone Very depressed that an engine with such potential gets tosse aside. Very sad. Scotty
  12. I'm going to try and install an aftermarket trans cooler to keep my non-HD tranny happy... I'm still getting slip-bangs from a rolling stop, but it only happens once the car has been driven for a while. During the summer, it would start happening after maybe 5-10 mins of driving, but since the weather has gotten cooler it takes maybe 20-30 minutes to start so I'm hoping that an auxiliary trans cooler will stop the slipping altogether. Has anyone done this to their own car? Could you tell me exactly what I have to buy and do to get it all hooked up?
  13. So I bought a shift knob from a GTP that has the High Performance shift button on it. I'll be installing the HD version of the 4t65e when I install the engine that is now in process. The PCM has the correct tables in it. I'm wondering how to wire it up. I would assume that it is an on off in the PCM harness. Anybody have experience with this? I would think it would not be that difficult but need some information on the task. I was told that there was an actual "kit" at one time but have not found the source. Thanks in advance for your input. Update: So I tried to post this to the original as an answer but it's not letting me do that for some reason. Anyway. I found what is apparently an answer here I have not tested this so I will not personally say it works, but it sure looks like a good answer.
  14. My 4T65-E HD has made a light buzzing sound when the car is rolling since day one. I believe one difference between the regular and HD is bearings on the outputs, do they typically make a little buzz? Not sure if I should be concerned.
  15. i have a 98 ltz i did the naughty thing and cut my springs to lower it. heard a few successful stories and gas monkey garage did it, but i think the 170k shocks couldnt handle the drop and odd spring rate. so yeah now the car starts slipping when coming off from stops but only after 10 minutes or so of driving. the other night i drove until it slipped, turned it off while i moved the other car away from my garage door to pull the lumi in and in the 2 min tops it sat the slip went away again. moral of the story that car is parked until i go get another set of struts to restore factory height. what could i have possibly damaged. if im gentle on the gas it'll pull decent, i feel if i were to give her id might as well be in neutral. What are your guy's thoughts. this is my excuse for a junkyard dog top swap/hd tranny build if its toast.
  16. Hi everybody, I'm Intrigued but you can call me Luke if you want. I'm a soon to be W-body owner in CT. I've owned a 1999 Ford Crown Victoria Police Interceptor for over a year now and it's really fun, but aftermarket options are really slim for it and it's incredibly expensive to fuel. My girlfriend's dad has a 1998 Oldsmobile Intrigue with 173k on it and all the luxuries put in (not that I care much about those) and he's giving it to me for free because he likes me ! I'm going to sell the Crown Vic and register the car really soon. It's not in my possession yet because he's so nice that he's having the car get looked over by a mechanic to be confident that it will treat me well. I think I might be picking it up tomorrow. Some people my age go the direction of putting in a fancy stereo and doing dramatic things to the body of a car, those look cool, but I really don't care too much. The first thing I'm going to do with this car is work on upgrading and replacing steering and suspension parts to improve handling. Eventually I'd love to upgrade the engine to be either turbo or supercharged, and of course give it the HD transaxle. But first things first, I'm going to just enjoy having the car and cleaning it up I'll keep you all posted!
  17. This is my first post. I currently own a 2005 chevy ss impala...... recently my trans stopped work, I removed it and had it rebuild... the guy who rebuild it was a gm A1 tech who I worked with before...... he tore it down and said the input clutch drum went bad.... so he rebuilt it, used drum from another 4t65e-hd, new bands, new clutches...... I ordered a 2500 stall speed convertor.... I installed it myself at the shop I work at..... I drive it and rides fine for the first few days... then I noticed a vibration at idle and at a slow creep.... a day later P0744 tcc stuck on/off.... I cleared it and drove it for another day. I contacted the place I bought the convertor from they said its prob the shift solenoids...(which I've replaced plenty of times and its usually a harsh shift) the next day, my trans stopped moving. Contacted my trans guy he said its prob the convertor(without tellin him where I got it) told me to put the old one in. Contacted the supplier they told me its an internal issue unless the splines from the convertor were broke.... also said no refund on used parts just warranty.... which if the t.c. is faulty why would I go through all that work just to possibly have another issue with there t.c..... what's your input people? Before I remove this trans again....
  18. This has to come earlier than expected in light of my recent lifter failure. I'm still debating if I should do it myself or have someone else do it. Here's what says I need: 1. L67 Series II Supercharged Engine (VIN “1â€ÂÂ) 2. 4T65E – HD Transmission 3. 4T65E – HD Transmission Lines 4. 4T65E – HD Transmission Axles (shorted axles are recommended) 5. L67 Powertrain Control Module (PCM/Computer) Custom DHP recommended ** 6. L36 High-Pressure Power Steering Line 7. L36 Monte Carlo or Lumina harness (98-99)* 8. L67 Cruise Control Module & Cable (Optional) 9. L67 Stock or Custom/Aftermarket 97+ Style Exhaust Downpipe 10. L67 Coolant Hoses (New) 11. Walbro High-Pressure Fuel Pump 255 ltr/hr or greater (stock pump will work of low HP appilcations) 12. Upper and Lower Radiator Hoses 13. Heater core lines 14. Belts Questions I have: 1. Why that particular wiring harness? Will it just be making my work easier? 2. Where do I get an engine and transmission? Bob said he could get the engine for $180 and transmission and axles for $60. I'm doubting I could get them around here for that price. 3. Where do I get a DHP PCM, and why is it recommended?
  19. I only have about 350 to spend and the lower the miles the better so pm me! Thanks
  20. 95regal

    regal antenna

    are there any inexpensive power or short fixed antennas that would work on a 95 regal coupe and pick up hd radio?
  21. On my 06 GTP for about the first 20 minutes of driving, the torque converter will randomly unlock. There seems to be no rhyme or reason to it, it is really random and it will do it on completely flat ground with the cruise set at 70. Other than that, the transmission feels great... very smooth through all gears and no slippage. It will do it in 3rd gear with the torque converter locked and also in 4th locked. What's really odd is that it stops doing it after about 20 minutes of driving on the highway. What could be causing this? Fluid level is good.
  22. Does Anyone Know If A 4T65E-HD From Any GM SuperCharged Vehicle Will Fit In A 1999 Grand Prix GTP
  23. Sometime soon I will be taking care of the no tcc in the regal... I believe its the valve body as the toccata solenoid was previously replaced... I have a couple options, I can take it to the trans shop and have them work on it... I can attempt the repair myself, however I do not have much experience tearing into transmissions, or install the same shift kit and HD diff into an 18k mile transmission that I bought a while back, which is currently in Canada... looking for your individual thoughts on the situation... the current trans has around 140k but shifts flawlessly with the exception of no tcc... both trannies are 3.29 geared trannies, the one in it is a 98 mc z34 trans and the low mile one is from an 02 gpgt... what would you do to fix this?
  24. 94SECOUPE


  25. araab

    trans problems

    I haven't been here in awhile. I have a 96 gtp with a heavily modded top swapped l36. I still have a stock 4t65e hd that's crapping out. I'm gonna build a good trans soon but I have a 4t65e from a 99 lesabre that I put an hd diff in to get me by until I get my good trans done. Does anyone know the FDR in this trans or how to find it. I need to know for tuning. The car still drives but first is weak. Need to do something before I'm stranded.
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