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DESCRIBE ISSUE....I picked up a 96 Tahoe 4X4 with no motor, trans, wiring and no engine control module. I installed a 383 motor, 4L65E trans, MSD EFI and TCM. The RPO codes for the rear end are, GU6 3.42 ratio and G80 posi. Tire size is, 245/75R 16, and I think the transfer case ratio is 2.72. My problem is I just got it running and my RPM was 4,000, going 40 mph, in 4th gear. Found out I was in 4wd low. Got it out of 4wd low,
for testing I removed driveshaft to front differential and know I am at 3,000 - 3,500 rpm, 45 mph in 4th gear. I am thinking I might be in 4wd high? If so how can I get it into 2wd high? Most wiring to transfer case and trans was removed when I bought this truck. Thank you for your help.
what i need from you is what transfer case you have and is it a manuel or electric shift transfer case