I've been searching and can find torque values for every bolt INSIDE the transmission, however.... The trans case to engine mounting bolts, 3/8" bolt. Good N Tight or ______ ft/lbs. The flex plate to crankshaft. 7/16 bolts 70ft lbs, or 1/2" bolts at 80 ft lbs. The converter to the flex plate. 5/16? bolts and 25-30 ft lbs???? Are these number about right, and how about the trans case to engine block? Thanks
Careful here...different grades get different torques, everything else being the same. Need to know the grade before going for installation torque. Devon
I looked around a bit and found most places are saying about 25-35 foot pounds. Not that you could get a torque wrench in there if the trans is installed in the car. I normally just snug them up, give a 1/2 turn and re tighten them after driving the vehicle.
I never understand the obsession about using a torque wrench for everything. Sometimes a little common sense and a few Ugh-Ugh's is all it takes.
I have never torqued those bolts, just good and tight, never had one come loose. In fact if I just drop the trans out of the racecar with the motor being setback. The only thing I can get in there is a 1/4 drive short 12pt 3/8 socket and the top takes a very very very long extension setup. I'm sure I can't be getting them that super tight. They have never came out or loose
Truthfully, it's the same for me, and you sorta know how fasteners behave after tightening/loosening them a few thousand times! The rules-of-thumb that should be avoided are: "Tighten it until it strips, then back it off half a turn." And for the poor Corvettes, "Tighten it until it cracks, then..." The same Devon
I figured the case to engine good-n-tite would be fine, but then I found the ARP bolts for flex plate to crankshaft and for $20 I get theirs. Only remaining question then is the torque converter to the flex plate bolts. Jim @ TSP sold me the converter and it came with bolts and washers but no spec. I sent him a message, but that was just earlier today. I expect I will hear back from him in the next days.
About 45 foot pounds but again I would just tighten them by feel. A little blue lock tight if you are worried. Just recheck them after you drive a bit.
If you have a car specific chassis service manual torque values for every fastener on the car is given on charts and or in the drawings Trans case to block = 35 Flywheel to crank = 58 manual & auto (455") converter to flex plate 30-40 35 is designed value as suggested above - a drop of blue loc-tite is good advice Many times you can't get a torque wrench on a bolt in an assembled car so you need to use the "developed feel" - not too tight, not stripped.
Thanks Larry. I have not seen that page before. That is great and pretty much what I figured, other than the washers / spacers. Good info to have now.
