Three-On-Tree Linkage Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MikeN** · 10-25-2007, 02:42 PM

Does anyone have a photo of the shift linkage at the transmission for a column-shifted 3-sp. manual? I need to know how the shift levers that attach to the transmission are oriented, i.e. do they point straight up when in neutral position, or straight down, etc. This would be on a fully-synchro Saginaw 3-sp, which I think applies to all 67-72.

68gmsee · 10-25-2007, 02:52 PM

Not sure if you can make it out on the pic, but they point down... Sorry it's the only pic I have.

**MikeN** · 10-25-2007, 03:01 PM

This is actually very helpful, thanks! If anyone else has additional photos they are much appreciated.

davidh · 10-25-2007, 03:21 PM

question, since the 6cy motor is mounted further up, would the 8cy 3speed be mounted closer to the front of the truck then? If so are there different mounts to easily move it up? say like the 6cy and 8cy position motor mounts. but for tranny's?

68gmsee · 10-25-2007, 03:40 PM

[QUOTE=davidh;2415929]question, since the 6cy motor is mounted further up, would the 8cy 3speed be mounted closer to the front of the truck then? ...QUOTE]

I believe that since the 6 cylinder is longer, there's no difference in the distance of the linkage/transmission mounting. It's been many years since I converted mine so my memory is foggy.

Someone else that has recently done this would know for sure.

**MikeN** · 10-26-2007, 10:41 AM

I am actually working on a 64 C10. I switched it over from 230ci I6 to a 350 V8. I did NOT change the frame mounts nor motor mounts, and the bellhousing and transmission are still in the original locations. It was a very simple swap.

I am now swapping the old non-synchro Saginaw, which is really not built to withstand the torque of a 350, to a later all-synchro transmission, hence my request for photos. I've got to sort the linkage out for the later transmission. I am retaining my column shift.

TDs6t9 · 10-26-2007, 11:24 AM

I did the same change on my '69 and the only problem I have is the clutch linkage through the firewall would hit if I had after market headers. I have ram horns and they clear with no problem. I believe if it was an 8 cyl. from the factory everything sits about 3" further forward.

**Don Brace** · 10-26-2007, 01:23 PM

My convertion to a 3 speed OD went much better than I thought it would. I have aftermarket headers and the clutch linkage clears by about half an inch.

Mt Man Chad · 10-26-2007, 02:21 PM

Here ya go these are from my 67!

**MikeN** · 10-26-2007, 03:26 PM

Thanks again for the photos, this is helpful.

10-25-2007, 02:42 PM	#1
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 782	Three-On-Tree Linkage Question Does anyone have a photo of the shift linkage at the transmission for a column-shifted 3-sp. manual? I need to know how the shift levers that attach to the transmission are oriented, i.e. do they point straight up when in neutral position, or straight down, etc. This would be on a fully-synchro Saginaw 3-sp, which I think applies to all 67-72.

10-25-2007, 02:52 PM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Three-On-Tree Linkage Question Not sure if you can make it out on the pic, but they point down... Sorry it's the only pic I have. Attached Images

10-25-2007, 03:01 PM	#3
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 782	Re: Three-On-Tree Linkage Question This is actually very helpful, thanks! If anyone else has additional photos they are much appreciated.

10-25-2007, 03:21 PM	#4
davidh Senior Member Join Date: Feb 2004 Location: Ponca city now kingfisher Oklahoma Posts: 1,221	Re: Three-On-Tree Linkage Question question, since the 6cy motor is mounted further up, would the 8cy 3speed be mounted closer to the front of the truck then? If so are there different mounts to easily move it up? say like the 6cy and 8cy position motor mounts. but for tranny's? __________________ Even the nicest dodge-chrysler is only 2years away from being parked outside of Section 8 housing.

10-25-2007, 03:40 PM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Three-On-Tree Linkage Question [QUOTE=davidh;2415929]question, since the 6cy motor is mounted further up, would the 8cy 3speed be mounted closer to the front of the truck then? ...QUOTE] I believe that since the 6 cylinder is longer, there's no difference in the distance of the linkage/transmission mounting. It's been many years since I converted mine so my memory is foggy. Someone else that has recently done this would know for sure.

10-26-2007, 10:41 AM	#6
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 782	Re: Three-On-Tree Linkage Question I am actually working on a 64 C10. I switched it over from 230ci I6 to a 350 V8. I did NOT change the frame mounts nor motor mounts, and the bellhousing and transmission are still in the original locations. It was a very simple swap. I am now swapping the old non-synchro Saginaw, which is really not built to withstand the torque of a 350, to a later all-synchro transmission, hence my request for photos. I've got to sort the linkage out for the later transmission. I am retaining my column shift.

10-26-2007, 11:24 AM	#7
TDs6t9 Registered User Join Date: Apr 2005 Location: Portsmouth, VA Posts: 59	Re: Three-On-Tree Linkage Question I did the same change on my '69 and the only problem I have is the clutch linkage through the firewall would hit if I had after market headers. I have ram horns and they clear with no problem. I believe if it was an 8 cyl. from the factory everything sits about 3" further forward.

10-26-2007, 01:23 PM	#8
Don Brace Active Member Join Date: Nov 2002 Location: Clarks Grove MN Posts: 487	Re: Three-On-Tree Linkage Question My convertion to a 3 speed OD went much better than I thought it would. I have aftermarket headers and the clutch linkage clears by about half an inch. __________________ Don Brace 55 Nomad 56 Nomad 58 Impalla Coupe 58 Bel-Aire 4D HT 61 Impala CVRT 409 4 SP 2- 71 Longhorns Always looking for old toy trains, Juke boxes Pin ball and game machines.

10-26-2007, 02:21 PM	#9
Mt Man Chad Registered User Join Date: Oct 2006 Location: Oakridge Oregon Posts: 1,865	Re: Three-On-Tree Linkage Question Here ya go these are from my 67! Attached Images __________________ 68 CST SWB - Gold/White 50th anniversary /TH350/Buddy Buckets/3.73 Posi/dogdish caps. 68 K10 Burb - Gold/White 327/SM465/NP205/3.73 "Daa Burb" build thread Last edited by Mt Man Chad; 10-26-2007 at 02:21 PM.

10-26-2007, 03:26 PM	#10
MikeN Senior Member Join Date: Oct 2007 Location: Marietta, GA Posts: 782	Re: Three-On-Tree Linkage Question Thanks again for the photos, this is helpful.

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