640 trans swap into a 850

dmbinva

Member
I have a 850 with a bad tranny, plan on swapping it with a 4 speed out of a 640 with a bad engine, any problems other than having to change the clutch and Pressure plate? Will I need to change out the flywheel too?
Boss
 
I would just switch the engine from the 850 and put it in place of the engine in the 640
 
(quoted from post at 15:41:51 06/29/15) I would just switch the engine from the 850 and put it in place of the engine in the 640
I want to keep the 850 rear and the lift works great on the 850. The 640 has been setting for some time but trans is quite and tight
 
Part number are different between the flywheel for the 9" and 10" clutch. It's likely the holes won't line up. Check up when you get them apart Or you might just want to switch them out like you said on the phone.

Kirk
 

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