[GMCZ7198]

So my rear axle grenaded a few weeks ago, put a new axle in and everything else. Now my tranny is not engaging in overdrive or manual 3rd ranges. Manual 2nd and 1st work, and reverse. Oh and this is sorta intermittent, when it does work its not for long and usually accompanied by a clang/bang from the transmission?? Anyone have some ideas, or had this problem before?

Thanks

 

[08RCSB]

A lot of times a G80 will take a transmission with it.

 

[keveyj]

ya the 3-4 burns up alot in these i had two go in 3 months time for a rebuild or a 4l80

 

[08RCSB]

ya the 3-4 burns up alot in these i had two go in 3 months time for a rebuild or a 4l80

What's your engine setup or mods?

 

[keveyj]

i got 4.8 4l60 flowmaster no cats tune and intake and 37's

 

[Manbearpig]

Are you geared for those 37's?

 

[Hit Man X]

You have a broken sprag.

Have a nice day.

 

[08RCSB]

:rofl2: a 4L80E for a 4.8? Seriously?

And are you geared? 4.88 or 5.13?

 

[Manbearpig]

And are you geared? 4.88 or 5.13?

Don't think he has

Which is probably his problem

 

[Hit Man X]

:rofl2: a 4L80E for a 4.8? Seriously?

And are you geared? 4.88 or 5.13?

Yeah. :nono:



Anyway, problem is the sprag. You get a new trans. :van:

 

[08RCSB]

Allison swap on a TBI 4.3 :imo

Anyway, a properly built 4L60E is more than enough assuming you have geared for your big ass tires

 

[keveyj]

i got 4'56s in it now but my 1st trans did the same and the truck was stock

 

[08RCSB]

4.56 is not enough gear for that tire.

Who is building your transmissions?

 

[Hit Man X]

4.56 is not enough gear for that tire.

Who is building your transmissions?

No shit! That's a 5.13:1 truck.

 

[keveyj]

i built one and the other two were built by two shops in new brunswick the truck has lots of power with the 4'56s and drives great and is great on gas thats why i didn;t go lower and i took off and a/c and did electric fans i notices a big difference in power

 

[08RCSB]

Still undergeared.

Anyway, I suggest a reputable shop for a 4L65E with some goodies.

 

[keveyj]

i picked up a 4l80 and i'm gonna be getting a 6l lq4 next week to swap in i want more power and something thats gonna hold up better

 

[Hit Man X]

i picked up a 4l80 and i'm gonna be getting a 6l lq4 next week to swap in i want more power and something thats gonna hold up better

Still undergeared. Whoever told you it was okay needs a swift kick in the ass.

 

[Juan!]

4L60E + Beast shell + a few other heavy duty replacements in there and they aren't so bad :imo

 

[1LOWDIESEL]

i've got a rebuilt 4l60e for $200 and i'm just over the river in jersey... oh i've got a rear too.