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1987-1991 Parley with regards to your 1987 to 1991 Bonneville, Olds 88 or Buick Le Sabre Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 09-08-2005, 11:01 AM   #21
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I think its time to talk to a tranny shop... There are some thing going on that make me think the trans will fail in the near future... May just be a valve body related problem... May even be a simple fix...

I'm not sure what all they can do as far as an upgrade goes.... I know they can used better clutches, and apply some updated or changes to the trans in the rebuild process... I'm lucky so far I guess.... at 123,000 my 4T60 has never put me down

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Old 09-08-2005, 11:03 AM   #22
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Quote:
Originally Posted by Andrew97Cobra
Just talked to a tranny rebuilder that was recommended by a friend.

The guy said that based on what'* happening, it'* a mechanical problem and that even without tearning into the tranny, it'* obvious that when the fluid is cold and thicker, the line pressure is not going high enough to make the tranny shift. Basically, its days are numbered.

So, I may even be able to drop the car off as early as tomorrow night and get a loaner to drive around in while they're rebuilding my tranny.

I'm looking at an estimate of $400 plus the cost of parts. While the tranny is out, I'll also get a new converter and install a new rear main seal since both of those things have almost 107k miles on them.
Sounds almost like the reduiler is thinking that the Trans oil pump is on its way out... Let us know how it all goes, and keep us updated

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Old 09-08-2005, 11:26 AM   #23
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He did mention the pump, but he obviously doesn't want to commit to any diagnosis until he tears into the tranny.

The original tranny in this car lasted about 30k miles and who knows how long it would have held up if my GF (now wife) and I didn't kill it by overheating it trying to climb up an incline in some deeper snow.

The current tranny is a GM factory rebuild and it really hasn't been abused in the 75k miles that are on it. It definitely should have lasted longer.

The guy did say that there are updated rebuild kits, so we'll definitely be going with that. I also hope that we can do something to reduce the "sloppiness" in the tranny between gears.

Now, I'm thinking, "What if the filter is clogged?" Well, if the original filter was not clogged after 50k miles, the new filter should not be clogged at 20k miles unless something went wrong inside and there is clutch material or metal shavings in there.
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Old 09-08-2005, 11:38 AM   #24
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Quote:
Originally Posted by Andrew97Cobra
He did mention the pump, but he obviously doesn't want to commit to any diagnosis until he tears into the tranny.

The original tranny in this car lasted about 30k miles and who knows how long it would have held up if my GF (now wife) and I didn't kill it by overheating it trying to climb up an incline in some deeper snow.

The current tranny is a GM factory rebuild and it really hasn't been abused in the 75k miles that are on it. It definitely should have lasted longer.

The guy did say that there are updated rebuild kits, so we'll definitely be going with that. I also hope that we can do something to reduce the "sloppiness" in the tranny between gears.

Now, I'm thinking, "What if the filter is clogged?" Well, if the original filter was not clogged after 50k miles, the new filter should not be clogged at 20k miles unless something went wrong inside and there is clutch material or metal shavings in there.
Yeah the filter inside that trans is simply a screen... But its possible that it could be clogged, but I do agree that somethinf would have to be wrong for the trans filter to be clogged... May be worth a shot... 6-7 qts of Dex III, and a 15-20 buck filter kit...

I have never had the tranny not shift... Mine is just the opposite, its actually shifty, in the way that when it shifts it shifts... Its pretty smooth, but not too sloppy... I can't complain too much as I'm on the original... I think the Cooler had something to do with that... and I have pretty much found nothing for friction material in the bottom of the pan when I do the tranny fluid changes... I'm not sure what all went wrong in your trans... But I'll be interested to know..

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Old 09-08-2005, 11:58 AM   #25
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I really think that if I change the filter, it'* just a band aid fix, if it even helps. There would have to be a boat load of crap in that pan to clog that screen. Like I said, when the tranny had 50k miles on it and the original fluid came out, the pan had nothing more than a thin dark film on it. If that screen got clogged in 20k miles, something is definitely up. Besides, it could be just the pump going bad.

I guess that I'll know what happened with my tranny by Monday or Tuesday if I drop off the car tomorrow night.
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Old 09-12-2005, 05:20 PM   #26
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OK, so the verdict is in from the transmission shop and it'* not good. The short answer is that a combination of heat and a possible factory defect killed the trans.

The highlights are that there was soot and metal in the pan, a chipped and glazed 2nd band, and a glazed overdrive band. The guy also said that the pinion in the differential was ovaled out. So, basically what I thought was going to be a cheap rebuild has turned into a pretty expensive one since hard parts now have to be replaced.

The only good news out of all this is that I'll be getting a better torque converter, the transmission will be rebuilt with heavy duty parts, and the valve body will be recalibrated to cut clutch slippage by 40% and lower heat as a result. The car only has 106k miles on it, so if all goes well, I should get my money'* worth out of this transmission.
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Old 09-12-2005, 05:23 PM   #27
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you planning on installing a tranny cooler too?
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Old 09-12-2005, 05:30 PM   #28
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Quote:
Originally Posted by rjolly87
you planning on installing a tranny cooler too?
After what the guy said and what I'm going to spend on the rebuild, I'd be crazy not to. Even if his valve body recalibration cuts the clutch slippage by 40%, a nice cooler can only help things further.
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Old 09-12-2005, 05:40 PM   #29
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I know this sounds stupid, but DO NOT FORGET TO FLUSH THE TRANSMISSION COOLER and ACCOMPANYING COOLER LINES. Betcha any money that was what was the demise of your current trans at such low miles.

Also I wish you luck in your rebuild quest, because I think I may need something like that on mine too . Maybe you can post the final cost [if you don't mind admitting to the hurrendous cost it will end out being].
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Old 09-12-2005, 05:48 PM   #30
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Quote:
Originally Posted by jr's3800
Quote:
Originally Posted by Andrew97Cobra
What tranny cooler are you running on yours? Was it a PITA to install?
It was a bit of a PITA...

I believe this is an Imperial... I think its made by the same company that makes the Hayden cooler... But if you look close I have no room between the cooler at the front support... I actually had to remove that support to squeeze the cooler in there...

You can almost see the cooler through the grille... I had more cuts than I knew what to do with... This is an oversized cooler... I bought a large cooler simply because I am in florida and it gets too hot done here..... I think this cooler is 24000 lbs + 3000 or 4000 I think... On my 95 I have a heavy duty RV cooler + 7000 Lbs.... I know the cooler on my 91 is just a bit smaller than the one I put on my 95, but not by very much...

I also purchased the correct lines so I could run the cooler simmilar to the factory set up.. Saved me time... Yes It was a bit of a PITA... I feel sorry for the 2000 + guys
Do you have the dimensions of that cooler? Also, what do you mean by correct lines? I found some Imperial coolers online and it says on all of them that a fitting kit is not required.
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