1967 C-10 LWB stepside Transmission ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

CRUMP68 · 05-22-2003, 02:48 PM

The truck has a 3 on the tree,6-cyl in it. It started to jump out of third gear about a year ago.I use to be able to hold in 3rd gear but it kicks out hard now.
I bought a tranny out of a 1978,it had a 6-cyl-3 on the tree also.I thank the tranny is stamped GM-30 wil it work on my 67?How about the linkage,is it the same as a 78?

**CPNE** · 05-22-2003, 02:54 PM

In 67/68 the 3 speed tranny was different than in 69-72 and later. Measure the lenght of the tranny and count te bolts on the shift fork cover plate. If they are the lame lenght and bolt count it'll work with no changes. Otherwise you are looking at changing driveshaft length and shift lever arms too.

CRUMP68 · 05-22-2003, 02:56 PM

Ill do that.
Thank You.

05-22-2003, 02:48 PM	#1
CRUMP68 Registered User Join Date: Apr 2003 Location: Ashland, Ky. Posts: 47	1967 C-10 LWB stepside Transmission ? The truck has a 3 on the tree,6-cyl in it. It started to jump out of third gear about a year ago.I use to be able to hold in 3rd gear but it kicks out hard now. I bought a tranny out of a 1978,it had a 6-cyl-3 on the tree also.I thank the tranny is stamped GM-30 wil it work on my 67?How about the linkage,is it the same as a 78?

05-22-2003, 02:54 PM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,662	In 67/68 the 3 speed tranny was different than in 69-72 and later. Measure the lenght of the tranny and count te bolts on the shift fork cover plate. If they are the lame lenght and bolt count it'll work with no changes. Otherwise you are looking at changing driveshaft length and shift lever arms too. __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

05-22-2003, 02:56 PM	#3
CRUMP68 Registered User Join Date: Apr 2003 Location: Ashland, Ky. Posts: 47	Ill do that. Thank You.



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