Is there a difference in 3-speed trans linkage, I6 -vs- V8? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

glock35ipsc · 08-14-2006, 05:37 PM

A fellow board member is installing the 3-speed trans, linkage, steering column... everything that came out of my 68, into his truck. My 68 was originally an I6. His truck is an original V8.

Is the 3-speed shift linkage rods on the I6 longer than the V8, since the V8 sits further forward, thus moving the trans farther up, making the length of the linkage rods shorter?

Or am I on crack???

**Green Machine** · 08-14-2006, 05:47 PM

Yep, the linkages for a I6 are longer than the V8(2wd), since the bellhousing and tranny sit farther to the rear.

glock35ipsc · 08-14-2006, 06:09 PM

That's kinda what I thought, just needed someone to confirm it. Thanks!!!!!

Chris, here's our answer!! Now if we only knew how much longer and where, we might be able to lengthen them........

powell72 · 08-14-2006, 06:42 PM

This sounds like dirtball and I have some work to do.......Oh well, my truck shifts.

**Green Machine** · 08-14-2006, 08:26 PM

I have a pair of I6 linkages here, I can dig em out and try to measure them if that will help, our camera is broken else I could get pics, or I could sell them or swap for some other parts ?

glock35ipsc · 08-14-2006, 11:15 PM

Quote:

Originally Posted by powell72

Oh well, my truck shifts.

Aren't you a helluva friend!?!?!!!!

Green Machine - Thanks for the offer. We currently have the I6 linkages, and are trying to install the tranny in a stock V8 setup. I think we either need to get linkages from a V8 truck, modify these, or move the whole enchalada.

57sailplane · 08-14-2006, 11:30 PM

man unless you are going for an orginal look i would put the motor trany combo in the 6's placement. it fits good and drives better i think. you will definatly see better hook in high hp situation.. oh ya i forgot the linkage will fit to..

dirtball · 08-15-2006, 11:10 PM

Quote:

Originally Posted by powell72

This sounds like dirtball and I have some work to do.......Oh well, my truck shifts.

hmmm, it's a 700R right? I wonder if it will shift tomorrow.

powell72 · 08-15-2006, 11:21 PM

Hey don't jinx it! It's very sensitive. Does anybody know if the z-bar is the same? I don't know why it wouldn't be, but we were wrong on the linkages so it wouldn't surprise me.

glock35ipsc · 08-15-2006, 11:40 PM

Quote:

Originally Posted by dirtball

hmmm, it's a 700R right? I wonder if it will shift tomorrow.

bryanw1968 · 08-16-2006, 05:52 PM

I used the same I6 linkage with a V8 swap. The motor is close to the fire wall but it works. This gives you a better weight transition if you're tryingn to hook up at the track. Other than that it is a pain in the butt cause I can't run tall valve covers

08-14-2006, 05:37 PM	#1
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Is there a difference in 3-speed trans linkage, I6 -vs- V8? A fellow board member is installing the 3-speed trans, linkage, steering column... everything that came out of my 68, into his truck. My 68 was originally an I6. His truck is an original V8. Is the 3-speed shift linkage rods on the I6 longer than the V8, since the V8 sits further forward, thus moving the trans farther up, making the length of the linkage rods shorter? Or am I on crack??? __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 08-14-2006 at 05:38 PM.

08-14-2006, 05:47 PM	#2
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? Yep, the linkages for a I6 are longer than the V8(2wd), since the bellhousing and tranny sit farther to the rear. __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

08-14-2006, 06:09 PM	#3
glock35ipsc Next project: 1970 K10 Join Date: Feb 2004 Location: Fort Collins, Colo 80524 Posts: 6,685	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? That's kinda what I thought, just needed someone to confirm it. Thanks!!!!! Chris, here's our answer!! Now if we only knew how much longer and where, we might be able to lengthen them........ __________________ *Bob* 1970 Chevy K10 LWB "Goldie" 350/TH350 *next project!!* 1981 Chevy C10 LWB 355/TH350 - My son's truck LS SWAP FORUM! Tons of LS swap info here! PLEASE CLICK HERE TO SUPPORT THE GREATEST BOARD ON THE NET! CLICK HERE FOR THE FAQ INDEX by KRUE Last edited by glock35ipsc; 08-14-2006 at 06:10 PM.

08-14-2006, 06:42 PM	#4
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? This sounds like dirtball and I have some work to do.......Oh well, my truck shifts. __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

08-14-2006, 08:26 PM	#5
Green Machine Senior Member Join Date: Jul 2004 Location: Estherville, Iowa Posts: 3,371	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? I have a pair of I6 linkages here, I can dig em out and try to measure them if that will help, our camera is broken else I could get pics, or I could sell them or swap for some other parts ? __________________ 1968 C10 307 3spd Long Fleet ------ http://67-72chevytrucks.com/vboard/s...d.php?t=201103 1970 C10 305 Super T10 Long Fleet --- http://67-72chevytrucks.com/vboard/s...d.php?t=202285 1971 C20 383 TH350 Dana Posi ----- http://67-72chevytrucks.com/vboard/s...d.php?t=206894 2001 GMC Sierra 1500 C3 6.0

08-14-2006, 11:30 PM	#7
57sailplane Senior Member Join Date: Mar 2004 Location: Nebraska Posts: 583	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? man unless you are going for an orginal look i would put the motor trany combo in the 6's placement. it fits good and drives better i think. you will definatly see better hook in high hp situation.. oh ya i forgot the linkage will fit to..

08-15-2006, 11:21 PM	#9
powell72 Senior Member Join Date: Jan 2005 Location: Loveland Co. Posts: 3,098	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? Hey don't jinx it! It's very sensitive. Does anybody know if the z-bar is the same? I don't know why it wouldn't be, but we were wrong on the linkages so it wouldn't surprise me. __________________ Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html

08-16-2006, 05:52 PM	#11
bryanw1968 Senior Member Join Date: Jul 2006 Location: Leander, Texas Posts: 850	Re: Is there a difference in 3-speed trans linkage, I6 -vs- V8? I used the same I6 linkage with a V8 swap. The motor is close to the fire wall but it works. This gives you a better weight transition if you're tryingn to hook up at the track. Other than that it is a pain in the butt cause I can't run tall valve covers



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