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1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-11-2008, 01:14 AM   #1
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Default Tranny gurus??

Jeez, a while since i posted or visited this board.

Anyways, 93 Park Avenue, NA 3.8 v6. has 361,000 kms on her.
I did a transmission flush yesterday. I found transmission fluid in the radiator the other day, and i suspected it might've got in the transmission. I don't know how long its been doing this, but the transmission has been working beautifully. The tranny fluid looked ok, red, but a bit darkish.
Decided to flush it out, and i used our wynns flush machine. It worked good after that, shifted well, went in OD, i thought it was working better.

Was comming down a street in fredericton, 100 kms later the next day, and i could feel it revving up quickly, and I was like, "uh oh.." I turned onto main st, and it went a little bit, then the all the engine would do is rev up, it felt like it was in neutral. I coasted a bit, and pulled in a parking lot, and still running, i checked the fluid. It was ok, so i tried to shift into reverse and drive. Still no response. Finally, I shut the engine off, restarted it and shifted into drive. The tranny responded and the car drove. So, i went back on the road. The tranny shifted into second, and the car seemed ok for the moment. Then it started revving up again, and it felt like the tranny was slipping badly. Finally I coasted into the liqour store and called up a friend.

As I was explaining what the tranny was doing, while the car was running, we could hear a hum come from the tranny in drive. Finally, I shut the car off and restarted it. The hum was gone. So we decided to try and get it back to the shop as there was no way i was gonna make the 30 km trek home.

When i went back on the road, back up the hill, with a limping tranny, I found it effective to just put the car in neutral, shut the engine off, restart, and the tranny would be working for a little while.

Anyways, so i need a tranny. I was so hoping to make it to 400,000kms on that original tranny, but oh well. I wonder if there is a pump issue? I doubt its the torque converter, there was good pressure and flow when i did the tranny flush compared with some of the other cars i've done. I wonder if i can rebuild it, but i'd need a manual, and lots of room to work with, as its pretty complex. I've done lots of things, but never a tranny. I was thinking i might as well, as i'm getting my block 3 of school done soon, and that covers transmissions, transaxles, differntials, transfer cases, etc.

Well, i'm gonna call some yards to see whats the cheapest i can get a tranny, but i don't really wanna just switch trannys, but rather, keep the old one in, heck its got that many kilometers on it.

Anyone here ever rebuild a 4t60-e?
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Old 09-11-2008, 07:44 AM   #2
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Look up Sandrock. He did a rebuild, I think the pics are here.

It does sound like your pump is starving for fluid. Did you drop the pan and look for any material that may be clogging the pick up area of the filter?
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Old 09-11-2008, 10:21 AM   #3
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here is what you do:

buy a used tranny and slap her in there. should be about 400 bucks shipped.
next you buy all the rebuild goodies you want and rebuild it as you have time and money. and once it'* all done slap the new on in there and sell the old one for EXACTLY what you paid for it and boom your done, you've learned something, and you have a better tranny then when you 1st got the car.
i don't see any other logical way of doing it.

i just want to add that a yard tranny i just as reliable imo and experience and a hell of alot cheaper then a rebuild(not done by yourself) any day of the week stock wise of course. i will never pay a shop to rebuild a stock transmission ever. i'd goto the dealer and get a new one for that price(which is honestly usually about equal) now a performance transmission i would pay to be rebuilt without a doubt...but then again i doubt i would have a performance automatic vs a manual so it would be cheap and i could do it myself
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Old 09-11-2008, 10:22 AM   #4
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Getting a tranny from a yard today, 133,000 kms on it, and they're selling it cheap.
Since the tranny'* comming out, I'm gonna check the pan beforehand. More than likely its gonna have a trans..
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Old 09-13-2008, 08:29 AM   #5
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Put a new radiator in first. This EXACT thing happened to my car--same symptoms and everything. I had a rebuilt trans put it and it didn't last long. Coolant got into the trans and ruined the rebuild. Fortunately the trans shop said they should have recognized the symptoms the first time and replaced the rebuilt tranny under warranty. Car probably needs a new radiator anyway. After 100000+ miles radiators are flowing about 50%, which is enough to keep cool in most situations, but not all, so if you replace it you are covering two problems (slo-flo radiator and possible leak into trans).
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Old 09-13-2008, 11:10 PM   #6
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I might replace the radiator, but i'm in no hurry really. I slapped a decent external cooler on it so it should be ok. I might do the rad later, but its still in good shape, its a shame.

I'm starting to wonder if this is common with these cars. My lesabre for some strange reason had a liter of tranny fluid in the rad years ago. I flushed and flushed the stuff out, and after that, sor the next 2 years, it never showed up in the rad or engine again. Never had a problem with it..

The tranny'* in the car now. I'm also comming to the realization that my body mounts are shot and will be pricy. Basically, the car'* getting old. The tranny came out of a lesabre apparently, but everything mated up good. I drove the car today after installing the tranny. It was pretty easy to do once the subframe is out of the way, i've heard of some guys doing it with the subframe still in!! The tranny feels different though. More relaxed, the shifts were more lazy, and it felt softer when shifting between gears. My old one felt harsher, had firm shifts, went into any gear firmly. When i flushed it out last tuesday, the day before it went to junk the flush machine showed pretty good flow like i said, as well as good pressure, (arounds 30 to 40 psi) at idle, so i didn't think the tranny would have a problem. Oh well, **** happens....
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Old 09-15-2008, 05:21 PM   #7
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After 100000+ miles radiators are flowing about 50%, which is enough to keep cool in most situations, but not all, so if you replace it you are covering two problems (slo-flo radiator and possible leak into trans). <--where are you getting that info from?
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