Posi rear end.

[olds307 and 403]

That is a crap shoot. The rear, might be first. You could upgrade to a Trutrac and girdle cover. Then the 4L60E will die first.

 

[L92 OLDS]

Fr

from my experience I would put money on the weights in the posi existing thru the diff cover.

It’s a clutch style posi… not gov loc. I’d say the transmission goes first.

 

[ck80]

I dunno, I'd probably vote that a used 4l60e, that was in a fbody that was probably beat on extensively before you got jt, would be the first to go of that pair.

Guess it depends on what you do to beat on it.

 

[JD1964]

I dunno, I'd probably vote that a used 4l60e, that was in a fbody that was probably beat on extensively before you got jt, would be the first to go of that pair.

The donor Fbody had 120k on the ticker so that’s what’s on the engine for sure. Seller claimed at the time we bought it the transmission had been rebuilt shortly before the car was taken off the road. I confirmed this true by finding the rebuild date and mechanics initials written on the bell housing. The trans works great.

We paid $1000 for the car, took what we wanted and made $1200 selling remaining parts. Sold the 3.23 posi too but now I wish I would have kept that. I could have used that diff and gears in beefing up one of the other 7.5’s we have.

 

[ck80]

The donor Fbody had 120k on the ticker so that’s what’s on the engine for sure. Seller claimed at the time we bought it the transmission had been rebuilt shortly before the car was taken off the road. I confirmed this true by finding the rebuild date and mechanics initials written on the bell housing. The trans works great.

We paid $1000 for the car, took what we wanted and made $1200 selling remaining parts. Sold the 3.23 posi too but now I wish I would have kept that. I could have used that diff and gears in beefing up one of the other 7.5’s we have.

Of course, it's still a 4l60... they work great until.... BOOM.

Dont suppose they gave you a receipt with any idea if it was a stockish rebuild or extensively upgraded, that and what the depth of knowledge of the rebuilding shop was by its reputation?

I'm still weary of a 4l60 trying to do much more than act as a paperwight.

 

[64nailhead]

4L60's are not junk until you try to turn up the wick under the hood. 300-350hp is fine on ne if it's built properly.

Your rear is what it is. Rebuild the posi with new clutches and get the setup SPOT on and it will live longer than that 4L60 IMHO.


Nice score on the rear and it's great to see some miles on the ride. I'll admit there is not much of anything better than heading out for a road trip and having success.

sls1025 deserves a smile as well. It's nice to see people treating people like people.

 

[JD1964]

Of course, it's still a 4l60... they work great until.... BOOM.

Dont suppose they gave you a receipt with any idea if it was a stockish rebuild or extensively upgraded, that and what the depth of knowledge of the rebuilding shop was by its reputation?

I'm still weary of a 4l60 trying to do much more than act as a paperwight.

Nope, no specific details on the rebuild. Only word of mouth that the dude was aware of the 4L60e weaknesses and had done things to improve it