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transmission to block bolts Please help

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Old Aug 20, 2009 | 05:05 PM
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Default transmission to block bolts Please help
are the bolt that bolt the trans to the engine metric ??? i was told there standARD but it stripped a tread with little pressure
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Old Aug 20, 2009 | 06:36 PM
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they shoud be metric i dont remember anything on my LS being standard when i did my swap
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Old Aug 20, 2009 | 06:36 PM
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they are metric cant remember exact size.
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Old Aug 20, 2009 | 06:49 PM
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thanks i stripped 3 of them dont know what to do now might have to heli coil them!!
someone told me they where 3/8 -16 x 1 1/2 inch long but there metric!!
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Old Aug 20, 2009 | 07:15 PM
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I think they are 8mm x 1.25mm x 38mm. All bolt, nut and threads on the GEN III / IV engines are metric.
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Old Aug 20, 2009 | 08:01 PM
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Originally Posted by bczee
I think they are 8mm x 1.25mm x 38mm. All bolt, nut and threads on the GEN III / IV engines are metric.
ok now what will i have to do they are stripped heli coil ?? or tap them out to next size i have no clue ??
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Old Aug 21, 2009 | 03:42 AM
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not sure on the length off the top of my head but they will be a 10mm x 1.50 thread pitch bolt
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Old Aug 23, 2009 | 07:13 PM
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they are a 13 mm bolt but the threads are the same as a 9/16 s bolt, i pulled my motor last week and when i put it on the engine stand i used the same exact bolts as u use for my old small blocks, screwed them in with my fingers, so i know they fit
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Old Aug 24, 2009 | 02:42 PM
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Originally Posted by Chris@Straightline
not sure on the length off the top of my head but they will be a 10mm x 1.50 thread pitch bolt
10mm-1.5 x 35

Originally Posted by 2001ws6-500hp
they are a 13 mm bolt but the threads are the same as a 9/16 s bolt, i pulled my motor last week and when i put it on the engine stand i used the same exact bolts as u use for my old small blocks, screwed them in with my fingers, so i know they fit
A 3/8-16 bolt will thread in (loosely) but as the OP found out, they WILL STRIP when any kind of torque load is applied!

Russ
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Old Aug 25, 2009 | 09:07 AM
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What are the bolt torque settings of the transmission (T56) to the engine block?
I found the BTS of the clutch housing to transmission to be 26lb.ft. but not transmission to engine. Are they the same torque?

Thanks,
Dan
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Old Aug 25, 2009 | 12:52 PM
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Originally Posted by Danno74Z
What are the bolt torque settings of the transmission (T56) to the engine block?
I found the BTS of the clutch housing to transmission to be 26lb.ft. but not transmission to engine. Are they the same torque?

Thanks,
Dan

37 ft-lbs...

Russ
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