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View Full Version : Transmission: Floor Shift For 700R Conversion



JoeHall
07-04-2014, 03:04 PM
I had originally hooked the 700R up to the OEM, column shift on the wife's GT. Its OK there, but just OK. The basic problem is that the range of motion on the tranny shift lever exceeds the range of motion of the OEM column lever. Today, tried again to dial it in a little better, but to no avail. I thought about setting up a bellcrank, anchored to the frame, 56J style (which worked great on a 56J I once installed a TH400 in), but that is a major project. So have decided to go with an aftermarket floorshift, and am considering this B&M "QuickSilver", unless someone has a better idea. Any comments or suggestions? http://www.ebay.com/itm/B-M-80683-QuickSilver-Shifter-/111037759535?pt=Motors_Car_Truck_Parts_Accessories&hash=item19da5dc02f&vxp=mtr

Gunslinger
07-04-2014, 03:25 PM
A shifter from an Avanti that came with a automatic overdrive will work...it looks almost identical to the original, but the indicator dial attaches different, and the linkages are slightly different. Nostalgic has everything needed.

JoeHall
07-04-2014, 05:28 PM
A shifter from an Avanti that came with a automatic overdrive will work...it looks almost identical to the original, but the indicator dial attaches different, and the linkages are slightly different. Nostalgic has everything needed.
I looked Nostalgic up, but their web site is down. I assume you are talking about a 1980s, Avanti II setup? I would need to get the neutral safety & backup light switches also. Is the Avanti type cable or rod connected?
Thanks,
Joe

sweetolbob
07-04-2014, 05:41 PM
Joe

The Avanti II setup is a rod. Price may scare you though by the time you get everything. You are also correct about the neutral safety switch which uses a GM style column setup. I don't think it will be real straight forward to install but a neutral safety switch is possible to add.


I'm not real familiar with the one you are looking at but the B&M Megashifter which I used on my 700R4 54K has a cable setup, an obvious pull-up to change gears and both neutral safety switch and back up light switch. Just compare the two and you won't go wrong.

Bob

PackardV8
07-04-2014, 05:51 PM
Joe, the U-Pik yards usually have GM floorshifters connected to 700R4s. Last one I bought cost me $15 complete with boot, plate, cable and ready to bolt in.

jack vines

Studeous
07-04-2014, 06:07 PM
1990 Pontiac Formula or Camaro should work fine. Like Jack was talking about.

Dick Steinkamp
07-04-2014, 08:00 PM
You might want to look at a Lokar column shift linkage...

http://www.summitracing.com/search/brand/lokar/product-line/lokar-column-shift-linkage?SortBy=Default&SortOrder=Default&autoview=SKU

Fully adjustable. I think they can handle the different range of motion between the trans and the shift lever.

JoeHall
07-04-2014, 09:33 PM
You might want to look at a Lokar column shift linkage...

http://www.summitracing.com/search/brand/lokar/product-line/lokar-column-shift-linkage?SortBy=Default&SortOrder=Default&autoview=SKU

Fully adjustable. I think they can handle the different range of motion between the trans and the shift lever.
Dick,
I already got one of those. Paid for the whole kit, but only used the shift ear for the tranny; used OEM rod with different connector to connect to the tranny shift ear (which is kinda wimpy). Problem is, when bringing the rod closer to center on that ear, it makes the gears so close together on the column shift handle, its hard to select between OD and 3rd; very easy to overshoot to 2nd. 36031 Stole this idea (the gizmo in upper right hand corner) from Bendtsen's, which is for 55/56 Packard, and real similar to the stock 56J bellcrank setup I mentioned above. Gotta come up with something.

Dick Steinkamp
07-04-2014, 09:39 PM
Problem is, when bringing the rod closer to center on that ear, it makes the gears so close together on the column shift handle, its hard to select between OD and 3rd; very easy to overshoot to 2nd.

Makes sense. I see the problem now.

wittsend
07-05-2014, 06:14 PM
I concur with others regarding the GM - Camaro/Firebird shifter. I put one in my Daytona when I went with a 700R4. I paid right about $15 for it. It has a full range of selection and the positions line up with the console markings. Neutral safety and reverse lights are wired into the shifter.

Shifter components:
36051
Shifter in car. Brackets made from construction framing strapping:
36053
Shifter with console from mid 80's Cadillac Seville (cut down 2"). Under the ashtray door is a late 70's "Computer" that calculates mileage, shows speed etc..
36052

64V-K7
07-05-2014, 07:27 PM
I concur with others regarding the GM - Camaro/Firebird shifter. I put one in my Daytona when I went with a 700R4. I paid right about $15 for it. It has a full range of selection and the positions line up with the console markings. Neutral safety and reverse lights are wired into the shifter.


I put the exact same thing in my Avanti.......... Very little fabrication to achieve this

JoeHall
07-05-2014, 09:08 PM
I concur with others regarding the GM - Camaro/Firebird shifter. I put one in my Daytona when I went with a 700R4. I paid right about $15 for it. It has a full range of selection and the positions line up with the console markings. Neutral safety and reverse lights are wired into the shifter.

Shifter components:
36051
Shifter in car. Brackets made from construction framing strapping:
36053
Shifter with console from mid 80's Cadillac Seville (cut down 2"). Under the ashtray door is a late 70's "Computer" that calculates mileage, shows speed etc..
36052
Wow, that is impressive. I did not realize it would have to be located so far rearward though. Would definitely have to give up the OEM console in the GT.
When I told the wife what I was up to, she objected and wants to keep it on the column if possible. So guess I'll install a bell crank. It puts the linkage rod in a straight line, instead of angle toward the shift lever ear on the tranny. It also takes the side load off the tranny shift shaft, and results in a more crisp movement as the column shift handle is moved from gear to gear, at least it did on the 56J with TH400. Out in the garage, I found most of the important 56J components, and can fab the rest. But what a PITA.

PackardV8
07-05-2014, 09:27 PM
Joe, the GM shifters can be made to fit the GT console if that's the deal breaker.

jack vines

JoeHall
07-05-2014, 09:53 PM
Joe, the GM shifters can be made to fit the GT console if that's the deal breaker.

jack vines
Thanks Jack,
I may come back to a GM floor shift later, but right now, the wife is the deal breaker :) I am pretty confident the 56J/GM hybrid bell crank will work out OK though, once done.
Thanks Again

wittsend
07-06-2014, 01:42 AM
The reason the shifter is located where it is (post #12), is because I positioned it to suite my body. I'm 6 ft., long waisted. It is cable actuated and withing reason can be positioned closer to the firewall.

JoeHall
07-06-2014, 04:54 PM
The reason the shifter is located where it is (post #12), is because I positioned it to suite my body. I'm 6 ft., long waisted. It is cable actuated and withing reason can be positioned closer to the firewall.
That's good to know, and as mentioned, will probably come back to the GM floor shift later, but gotta try one more time to please the wife. After all, it is her car, as she reminded me recently ;)

Today, once again I tried to adjust it out better. Comparing FOM to 700R, here are the challenges: the range of motion of the FOM shift lever is about 45 degrees; its closer to 90 on the 700R. Since the OEM shift column is matched to the FOM, the problem with the 700R becomes accessing all gears.

Similarly, the radius or the above shift lever on the FOM is 2.75"; on the 700R it is 1.875". Currently, the adjustable LoCar lever is set at 1.75", which makes the gears real close together at the shift handle.

In adjusting it out, the upper end (P-R-N-OD), or the lower end (OD-3-2-1) can be dialed in, but not both. I chose the upper end for obvious reasons, but am trying to include 3rd, since it is best for town & country driving, at least with the 3.07 behind it. Today was successful in including 3rd, but will see how it works for a few hundred miles. Hoping for the best, but the GM is definitely plan 'B'.

Thanks