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From: Boston, Dallas, Detroit, SoCal, back to Boston MA
Driveline bolts
Had a devil of a time getting the transmission out
Used a 1,200 ft-lb rated impact to get the transmission to bellhousing bolts out
It was anti-seized, but they're going into magnesium.
I'm just going to replace what I can find.
The rest of the driveline bolts I found in available kits
The only source I found for the M12x45's holding the trans to the bellhousing is McMaster-Carr
Had a devil of a time getting the transmission out
Used a 1,200 ft-lb rated impact to get the transmission to bellhousing bolts out
It was anti-seized, but they're going into magnesium.
I'm just going to replace what I can find.
The rest of the driveline bolts I found in available kits
The only source I found for the M12x45's holding the trans to the bellhousing is McMaster-Carr
Just curious where people got theirs.
Are they flange headed? The OE I see for '91 + L98, LT1/4 spec'd for 45 length but '89 and '90 + all LT5 are spec'd at 40 length. I've messaged a friend to see if GM might offer a replacing equivalent but I won't hear from him until tomorrow late in the day.
I find 10.9 Flanged Head 40mm that's likely thread to head and a 45mm that's likely NOT but both are 'Flanged Head'. Let's see what my friend tells me tomorrow. I find many 40mm full thread 10.9 bolts.
That would be a reasonable starting point if I were shopping them. A truck dealer of any brand so long as you can carry in a sample. A local spring, frame or heavy duty shop also. You got I see my PMs!