'08 Z71 Tahoe Rear Control Arm Bolt Torque Specs?

[EddieC]

Can anyone provide the bolt torque specs?
Should the suspension be loaded before torquing?

 

[Big Mama]

I’ll bet @swathdiver knows.

 

[EddieC]

Thanks, I got a link to the information elsewhere.

 

[swathdiver]

Since @EddieC decided to keep the specs a secret, I'll post them here for those who come along after us! LOL

Both the Upper and Lower control arm bolts at both ends get torqued to 74 foot pounds plus 55 degrees. Do this is with the suspension supporting the weight of the vehicle.

 

[EddieC]

Since @EddieC decided to keep the specs a secret, I'll post them here for those who come along after us! LOL

Both the Upper and Lower control arm bolts at both ends get torqued to 74 foot pounds plus 55 degrees. Do this is with the suspension supporting the weight of the vehicle.

That's not what I found but don't want to vouch for the information so I didn't post it. I will say that was significantly more torque with no "plus".

 

[iamdub]

18 ugga duggas plus some° of ugga duggas.

 

[EddieC]

18 ugga duggas plus some° of ugga duggas.




View attachment 421741

If I were to use torque specs I'd never depend on ugga dugga.
Besides, I love my split beam torque wrench so I look for excuses to go get it.

 

[swathdiver]

That's not what I found but don't want to vouch for the information so I didn't post it. I will say that was significantly more torque with no "plus".

Off the top of my head the uppers up front are 140 foot pounds. I seem to remember us just torquing the rears to 74 or so and calling it a day. We'll be replacing them again soon with new ones and hope to remember to report back and see if that setting held up over the years since we did it.

 

[Doubeleive]

For the gmt900 1500
Rear lower control arms
74ft lbs+55deg
Rear upper control arms
118ft lb

 

[mikez71]

Here's what charm.li says...
Apparently, lower arm @ axle (74lbft+95deg), gets more torque than lower arm @ frame (62lbft+55deg).
And upper arm torque is also a little bit more than the lower arm to frame torque..

(rear suspension torque values shown below)

 

[Scrappycrow]

The "plus ## degrees" are TTY bolts?

 

[mikez71]

I have not heard them called TTY anywhere yet..

 

[Doubeleive]

this is from the 2012 chilton service manual hardback. the smaller vehicles (acadia/enclave) had different torq for frame-vs-axle mounting
not uncommon for gm to change the specs a little over the years of production