TH400 Conversion from M6
Rear Cover Bolts Swap
Rear Cover Bolts Swap
Tools Needed
Ratchet
5 mm hex head socket (varies)
10 mm socket
Short extension
Replacement Rear Cover Bolts (12)
Ratchet
5 mm hex head socket (varies)
10 mm socket
Short extension
Replacement Rear Cover Bolts (12)
Remove one rear cover bolt at a time and replace with a button head bolt. Torque to 18 ft-kb (GM Service Manual 1999 6-529) There are a total of 12 rear cover bolts that need to be replaced.
I had a situation where the head of the torque convertor bolts were hitting the heads of the rear cover bolts. Also, it helps with clearance on the bell housing.
Replacement Bolt:
M8-1.25 x 20mm ISO 7380 Class 10.9 Plain Button Socket Cap Screw
Tech Note: I measured the stock length rear cover bolts to be 30mm.
I had a situation where the head of the torque convertor bolts were hitting the heads of the rear cover bolts. Also, it helps with clearance on the bell housing.
Replacement Bolt:
M8-1.25 x 20mm ISO 7380 Class 10.9 Plain Button Socket Cap Screw
Tech Note: I measured the stock length rear cover bolts to be 30mm.
Replacement Bolt:
M8-1.25 x 20mm ISO 7380 Class 10.9 Plain Button Socket Cap Screw
Tech Note: I measured the stock length rear cover bolts to be 30mm.
M8-1.25 x 20mm ISO 7380 Class 10.9 Plain Button Socket Cap Screw
Tech Note: I measured the stock length rear cover bolts to be 30mm.
All 12 rear cover bolts replaced.
