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CampaS75 · 09-28-2017, 06:04 PM

I have a '75 GMC motorhome and the transmission slips so bad n lost 3rd gear so took it out.
Bought a rebuilt TH400 from an '87 Chev truck but splines are 27 and my original is 32 spline.
Is it possible to swap shafts(rear) ?
How tricky is it ?

09-28-2017, 06:04 PM	#1
CampaS75 Registered User Join Date: Sep 2017 Location: Calgary, Alberta Posts: 11	75 GMC motirhome TH400 rebuild ? I have a '75 GMC motorhome and the transmission slips so bad n lost 3rd gear so took it out. Bought a rebuilt TH400 from an '87 Chev truck but splines are 27 and my original is 32 spline. Is it possible to swap shafts(rear) ? How tricky is it ?