Tranny pan torque
Burning Brakes
Joined: Feb 2008
Posts: 988
Likes: 7
From: Sarasota Fl
For the 700R4, my '91 FSM says it is 11 N-m or 97 in-lbs. When I rebuilt mine, I spoke to Dana at ProBuilt Automatics, who supplied my rebuild kit and Vigilante TC and helped me tremendously throughout the rebuild, he said 97 in-lbs was a lot and recommended I tighten only to 65-75 in-lbs. Whatever torque value you choose, make sure to tighten all to a lower torque first and go all around the pan. Then go to the final torque value. You might want to run all the bolts through a die if you haven't already and re-tap the case holes. Start the bolts off by hand too so you don't cross-thread the aluminum tranny case threads.
Jonathan
Jonathan
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
torque
I wouldn't tighten them any more than 50 inch Lbs.
Look up torque specs on Google, and print the torque specs for different bolts made of different materials based upon the diameter of the bolt for future reference....There will be nut torques as well.
Remember when possible, torque the nut not the bolt.
Look up torque specs on Google, and print the torque specs for different bolts made of different materials based upon the diameter of the bolt for future reference....There will be nut torques as well.
Remember when possible, torque the nut not the bolt.
Instructor
Joined: Jul 2007
Posts: 222
Likes: 0
From: Toronto(Don Mills) Ontario
I wouldn't tighten them any more than 50 inch Lbs.
Look up torque specs on Google, and print the torque specs for different bolts made of different materials based upon the diameter of the bolt for future reference....There will be nut torques as well.
Remember when possible, torque the nut not the bolt.
Look up torque specs on Google, and print the torque specs for different bolts made of different materials based upon the diameter of the bolt for future reference....There will be nut torques as well.
Remember when possible, torque the nut not the bolt.
This thread reminds me that on the last trans fluid/filter change on my L86 Coupe, one of the original pan bolts broke(head broke off clean,level with bottom of the trans/gasket case)!? My tech was using a small air ratchet - I assume the bolt/head got over-torqued? Rather than take a chance of the trans/case gasket surface getting 'buggered' by trying to drill out/remove the stub - we just put a new gasket on the pan, and carefully tighten up all of the other/remaining trans-pan bolts. It's been good(no leaks) since! Anyone have a 'safe' method of removing the broken pan-bolt stub? And shoud I get/use a set of better(ARP)? -trans pan bolts, or just a new set of OEM bolts, and then make sure no one over-torques them?! Cheers 
Pro
Joined: Sep 2007
Posts: 545
Likes: 2
From: st albert alberta
This thread reminds me that on the last trans fluid/filter change on my L86 Coupe, one of the original pan bolts broke(head broke off clean,level with bottom of the trans/gasket case)!? My tech was using a small air ratchet - I assume the bolt/head got over-torqued? Rather than take a chance of the trans/case gasket surface getting 'buggered' by trying to drill out/remove the stub - we just put a new gasket on the pan, and carefully tighten up all of the other/remaining trans-pan bolts. It's been good(no leaks) since! Anyone have a 'safe' method of removing the broken pan-bolt stub? And shoud I get/use a set of better(ARP)? -trans pan bolts, or just a new set of OEM bolts, and then make sure no one over-torques them?! Cheers 
btw, you can find a bunch of different picks at princess auto .
Last edited by makn u shiver; Sep 5, 2008 at 02:20 PM.
Instructor
Joined: Jul 2007
Posts: 222
Likes: 0
From: Toronto(Don Mills) Ontario
Thinking back now - I think the pan bolt head broke when my guy was removing the pan bolts!(hey - it's been a few years!). Initially, he tried to bavk-out the stub by trying to turn it out with the edge of a small,sharp chisel. that did not seem to get it to back out, so I said to just leave it in place, and snug up the remaining bolts with a new gasket. That sealed the pan, but at some point I would still like to get the stub out, and replaced! Thanks for the thought. tho! Cheers! 
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
