CHADsterss

I just got my tranny rebuilt about 5 or 6 months ago and it's already slipping... What should I do? Go to the same shop and have the warranty that came with it to take care of the rebuild or what?? I don't want to have to be getting a new tranny build every 5-6 months...

Any ideas are welcome. It's my 4th and 3rd gear slipping.

GT Griller

iTrader: (8)

I would go back and get the warranty work done...and for the next 5-6 months save up the cash for a real transmission...that way when it slips again u already have the money for a good build.

CHADsterss

Real transmission as in the 4L80E?

jimmyblue

iTrader: (11)

I think you need to take a step back and figure out why you are chewing
up transmissions.

CHADsterss

I think I figured it out. Could be the fact that I have a stock tune... Just an idea though.

hotjohnnyls1

u have a converter?

lt1pwr1

iTrader: (1)

K well this is a no brainer. If you have a warranty that will cover 100% then no doubt have them fix it for now to at least get you back on the road. Then, like others said save up for a better trans (think sponsor on this site).

Also, if you have heavy mods then in my opinion it isn't really fair to do that to a shop that doesn't specialize in high performance 4l60e if they only do stock rebuilds. That is a ton of work to do over again for free.

Jeremy@RPMTransmissions

iTrader: (12)

Unfortunately this is a post I see time and time again. A guy has his trans built at a local shop. They do it cheaper than the specialty shops but they end up fixing it 2-3+ times before the guy gets fed up and buys a built unit.

I agree with GT Griller. Let them fix it and save your cash for a well built unit. Unless you are making 700-800rwhp you don't need a 4L80e. One of our RPM built 4L60e transmissions will work perfect for you. Other 4L60e builders might not be able to build a unit capable of handling quite as much power tho.

ausls1

i had this same problem with my 4l60e but was 1st to 2nd gear in my 2002 Holden ss commodore. The local Holden dealer sent it out for repair under warranty and it was fine for a little bit, well as good as a reco'd auto is anyway, bout 5-6 months later it got worse and worse again, took it back to holden a couple of months later after an auto fluid and filter change didn't help and they sent it out to the same place under warranty, turned out to be a shift solenoid.

Also explains why it had to be pulled down and rechecked two-three times at the auto place before being sent back as Holden guys told me cause i was busting them about a 3 week wait for an auto rebuild on my car.

SnIpEz

iTrader: (4)

I'd recommend a 4L80E. Just because you don't have higher horsepower in the 700+ range doesn't mean one wouldn't be the best option. I could break it down into exact science why the 4L60E is a very flawed transmission, but if you are not familiar with the internals than it probably wouldn't matter to you lol. I WILL say that it is workable to a point. The 500-550 range is really their reliable limit, and even then that's pushing it.

If you want an idea of why the 4L80E is much stronger (mind you, just an idea not an exact reason) just Google pictures of 4L60E internals and 4L80E internals. You should see a distinct difference in regards to how robust the components are.

If you even think you want more power later (and who doesn't??) I would carefully consider your options. I know a guy who spent $21,000 (yes, did not accidentally add an extra 0) on a reputable shop that builds 4L60E, finally swapped to a 4L80E and his transmission is undoubtedly going to outlast his engine. He has a 1,007 or an 1,107 hp 2000 Trans Am, F-1C Procharged.

sweet99ss

iTrader: (41)

Went through this with my 93 z28. Bought it with brand new rebuild. I had to take it back atleast 3 times to get fixed. Local shops are not good for rebuilding transmissions for higher powered cars. Get it built by one or the sponsors on here. rpmtransmissions-flt-or performabuilt are all good I beleive.

ls2pontiac

iTrader: (1)

Rev it up to about 6000 in neutral and drop it into drive, then take it back and tell them it doesnt work. Thats what i would do.

CHADsterss

All I have is bolt ons so I really don't need to buy a 4L80E... YET. I'm not making that much power

2boyss

I bought the monster in a box kit for my 4l60e at 1000 bucks had a great local shop rebuild it complete.
Sent it to PSA performance here in Michigan for the tune and its been a head snapper since.

mrvedit

The stock tune does not program the trans to apply max fluid pressure during the shifts in order to make shifts feel smooth and seamless. This results in the clutches slipping more and wearing out faster.
Since you have a warranty, consider having the shop rebuild the trans and also install the Transgo HD2 shiftkit. This will firm up the shifts and increase the overall fluid pressure. Perhaps install performance clutches too. The better clutches might cost an extra $100 and the shift kit 4 hours of labor. Then consider a tune too.

See this thread too:
https://ls1tech.com/forums/automatic...shift-kit.html

(I'm no trans expert, just my opinions.)