Carbureted LSX forum - You are the weakest link....

Had some car trouble Friday night at the dragstrip. My 7.5 rear is FINE, no issues there. The motor is 100% also. It is my newly rebuilt 4L60 tranny (500 miles on it) blew the band apart. Very cool guys at the transmission shop R & R d it - all under warranty.

The trans tech didn't think the engine put out "that kind of power";)

Lol, well, at least it was just sweat off your back.

Sounds like they are good guys. Hopefully they will make this build strong enough.

sounds like you have found an awesome tranny shop.

He said they used "heavy duty/truck" parts - says I probably should've gone with "racing parts"

The funny thing is that EVERYONE thought that the 7.5 was going to be the weak link.

My brother got away with quite a bit on his Malibu with the 7.5.

The 7.5 is suprisingly decent behind an automatic. Its the brutal launches from a T56 with a centerforce clutch and ET Streets that will kill them, lol. Ask me how I know, lol. You can use a girdled rear end cover and make some bars to pre load the axle tubes to prevent twisting or bending the axle tubes. Eric L

It's cool the see them do all that though.

the 26 spine axles will usually be the first thing to expire...

I have never liked the 700/R4, 4L60E trans.

The 4l60, Ls models are better than a 700 by allot, they handle Ls motors from the factory and the 700 handle wimp motors from stock. But they still handle only so much.

put a stick in it. problem solved. :D

put a stick in it. problem solved. :D

HAHA,sorta,not really........., but it is fun

Ever since i put my brian at sk speed built richmond 5 in my car,no more trans issues (nuked 7 super t-10's in 2007) (knocks on wood!) . One of the best moves i ever made. The other being the ls lol

put a stick in it. problem solved. :D

So the 7.5 rear would last 5 minutes, or double that?

Surprisingly, i had a 7.5 that never broke, with 383 engines beating them, dont know why it never broke, but the others....well, they did. That was with a T5, and a centerforce clutch.

The thinner the teeth, 4.10s ect, those are the ones that seem to die quickly.

So the 7.5 rear would last 5 minutes, or double that?

Hey one issue at a time pal. I fixed your tranny problem with my answer. You want me to build it for you too?! :D

Lol sorry i am just not a fan of automatics...ever. good luck man!

I had a 5 speed in a 5.0 Mustang a couple years ago. It was fun and ran high 12s, but I wanted to go with something different.

Manual pedal assemblies for G bodies are very hard to locate.

A company just started making them...complete kit with zbar. Check the whats new section in carcraft either this months or last :D stick g body...now thats different!

Got a guy here with a 408 t56 setup on a MCSS, idk what he used for pedals in the 6 speed swap but it is really nice.

Think it is user name TheMerv.

Funny on the 7.5s. I ran one in my 81 Malibu in 1996 with a pretty mild 454 in it. It would only ever break axles rolling out of the burnout box when the tires would bite to slow down. I put a set of Mosers in it and never had a problem after that. In 2000 I found a fairly well priced 8.5 so I swapped it in with a set of 28 spline Stranges, GM Eaton, and GM 3.73s and have a few dozen 9 second, sub 1.50 60 foot times. I have gone through three sets of brakes since then but no diff issues.

My brother ran his 7.5 equipped early 80s Malibu with a spool, cap studs and moser axles for 2 years behind a small block 400 with nitrous. I think it went mid elevens. He claims he got into the 10s before he sold it, but I never saw it. :eyes:

I am thinking i will become determined to learn how to swap mounting brackets one day so i can make whatever rear work on nearly anything, as long as length is close or identical. The ford 8.8s are ridiculously plentiful and strong as a 12 bolt, but the 1500$ 12 bolts and 9 inch rears used are not easy to pass up when they are direct bolt ins! LOL

I am thinking i will become determined to learn how to swap mounting brackets one day so i can make whatever rear work on nearly anything, as long as length is close or identical. The ford 8.8s are ridiculously plentiful and strong as a 12 bolt, but the 1500$ 12 bolts and 9 inch rears used are not easy to pass up when they are direct bolt ins! LOL

True. When I did my 78 Malibu I couldn't find a well priced 8.5 but I have 12 bolts coming out of my ears here are the shop. Grabbed a set of upper relocation brackets, built a quickie 4.10 12 bolt, bent some lines, and viola, I have 3 inches of rubber hanging outside my quarters. I bought some 16" 2000 Z28 rims and threw some drag radials and she has already hit a 1.51 60 foot. I found a set of Weld 10 holes that fit perfect so I threw a set of used 275 Mickeys on it and matched the fronts.

That is great, I am wanting to learn how to get the geometry correct on getting the mounts located in that perfect position.

I think your issue is going to be torque arm mounting. Where it attaches is cast into the centersection. Does someone make an add on bracket or something?

People have made brackets that case around the center section, but I am wanting to do t with any vehicle, not just my mullet rides. Am sure I could fab something for that any day, it is still getting mounts welded on and at the proper position I am worried about.

People have made brackets that case around the center section, but I am wanting to do t with any vehicle, not just my mullet rides. Am sure I could fab something for that any day, it is still getting mounts welded on and at the proper position I am worried about.

TA mount 8.8 setup kinda like this: http://ls1tech.com/forums/gears-axles/1478765-8-8-build-unique-ta-mount-2.html

Well..............my 7.5 grenaded (spider gears) and my "new" 4L60 is also toast
:bang:
I'm on a really tight budget - 4 kids (oldest in college)

saving up for a THM400 & S60

Well..............my 7.5 grenaded (spider gears) and my "new" 4L60 is also toast
:bang:
I'm on a really tight budget - 4 kids (oldest in college)

saving up for a THM400 & S60

Man, that sucks. 2 out of 2.

The track was really sticky - when the tree came down I hit it and the axle started to hop (which it never has before).

I think the rear siezed up for a second and took the trans out.:cry:

The track was really sticky - when the tree came down I hit it and the axle started to hop (which it never has before).

I think the rear siezed up for a second and took the trans out.:cry:

Wheel hop is an absolute killer. GNs would do it when they start to make a little power. Oddly enough, mine was never prone to it and I remember my rear suspension being stock.

Sorry to hear man, hope you manage to get it together pretty quick. I am waiting till income tax.

HA! I've got plans for my tax refund too:

http://i49.tinypic.com/m9szfa.jpg


It might be slow, but it will not break again!

That's the way to do it.

HA! I've got plans for my tax refund too:

http://i49.tinypic.com/m9szfa.jpg


It might be slow, but it will not break again!
The Dana60 being slower than a 12 bolt or 9" is a myth.
I run a Dana60, virtually indestructable, and a wise choice.

Before, I was attempting to go the lightweight route - lighter tranny, lighter rear etc. etc. and hope things would hold together because the car weighed less as a result.

Unfortunately, I must now switch to the heavy (heavy duty) route, and the car will put on some weight, but hopefully I will break things less often.

Amazing what guys will do in pursuit of that one little 60ft number.....:bomb: