The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Gear Vendor holding shift point too long?

chevy_mike · 05-09-2017, 10:50 AM

When I had my M1010 with the same 6.2L diesel and T400 trans (no gear vendor) I had this same problem. Ended up being a bad vacuum modulator on the trans and broken vacuum line. Once I replaced those items, it shifted great. Without these working, the T400 trans will use the mechanical governor to shift, which is at high RPM.

05-09-2017, 10:50 AM	#2
chevy_mike Never Ending Projects Join Date: Jul 2006 Location: San Diego, CA Posts: 3,836	Re: Gear Vendor holding shift point too long? When I had my M1010 with the same 6.2L diesel and T400 trans (no gear vendor) I had this same problem. Ended up being a bad vacuum modulator on the trans and broken vacuum line. Once I replaced those items, it shifted great. Without these working, the T400 trans will use the mechanical governor to shift, which is at high RPM. __________________ . 1965 C10 Panel, Tiki Express http://www.67-72chevytrucks.com/vboa...d.php?t=506580 SOLD 1968 Chevy C10, Long, Fleetside, Hot Rod Hauler http://67-72chevytrucks.com/vboard/s...d.php?t=313233 SOLD 1965 Chevy C10, Long, Fleetside, Hot Rod C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415702 SOLD We were given two ears and one mouth for a reason... listen twice as much and speak half as often...