what makes it bump between gear selections - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JointTech · 06-09-2013, 03:20 AM

here some images of the weird linkage. you can still see the welding wire sticking off it. It was stretched for some reason i guess.

**LockDoc** · 06-09-2013, 08:50 AM

Quote:

Originally Posted by JointTech

here some images of the weird linkage. you can still see the welding wire sticking off it. It was stretched for some reason i guess.

Evidently they couldn't find the right linkage so they used a little American ingenuity...

LockDoc

HotRod C/10 · 11-29-2013, 10:16 PM

Great info here.

**Boog** · 11-30-2013, 07:39 AM

We can see by your pic someone in the truck's past cobbled a shifter linkage together by cutting and welding the bracket at the trans end. He didn't have all the correct pieces so he made do with what he had. Some parts have been lost over the past 40 yrs.
Tim posted the correct pieces in that diagram to make it all work smoothly. They are available.
The main drawback to the straight aftermarket linkage is it doesn't manage engine torque effect with that straight setup. As the engine/tranny torques over it pushes the linkage upward. The OE linkage addresses engine /trans movement.
It is not a problem under normal driving conditions but with this aftermarket linkage you might see the shift lever in the cab move upward under hard acceleration or in offroading situations where the frame and cab twist a bit.

06-09-2013, 03:20 AM	#26
JointTech Registered User Join Date: Feb 2012 Location: Mission Viejo, CA Posts: 1,856	Re: what makes it bump between gear selections here some images of the weird linkage. you can still see the welding wire sticking off it. It was stretched for some reason i guess. __________________ 72 C20 Long Bed SB350 TH400 14 bolt rear end Extremely boring build thread

11-29-2013, 10:16 PM	#28
HotRod C/10 Registered User Join Date: Feb 2012 Location: Albuquerque NM Posts: 3,053	Re: what makes it bump between gear selections Great info here. __________________ SOLD -77 CHEYENNE SWB, LS SWAPPED -1976 SILVERADO YUBA GOLD/NEUTRAL (2-TONE)

11-30-2013, 07:39 AM	#29
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,092	Re: what makes it bump between gear selections We can see by your pic someone in the truck's past cobbled a shifter linkage together by cutting and welding the bracket at the trans end. He didn't have all the correct pieces so he made do with what he had. Some parts have been lost over the past 40 yrs. Tim posted the correct pieces in that diagram to make it all work smoothly. They are available. The main drawback to the straight aftermarket linkage is it doesn't manage engine torque effect with that straight setup. As the engine/tranny torques over it pushes the linkage upward. The OE linkage addresses engine /trans movement. It is not a problem under normal driving conditions but with this aftermarket linkage you might see the shift lever in the cab move upward under hard acceleration or in offroading situations where the frame and cab twist a bit. Attached Images __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross



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