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Jakethesnake

What 5 or 6 spd will fit in place of a top loader

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Looking to swap trans in 71 Mach original 4 spd car to a 5 or 6 speed. Don’t want to modify tunnel or shifter location.  Clean install so it can be put back to 4spd and no difference to car.  What trans should I be looking for? Thanks.  

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Posted (edited)
9 hours ago, Jakethesnake said:

Looking to swap trans in 71 Mach original 4 spd car to a 5 or 6 speed. Don’t want to modify tunnel or shifter location.  Clean install so it can be put back to 4spd and no difference to car.  What trans should I be looking for? Thanks.  

I wasn't going to chime in on this as I've not done the swap to mine. I think you'll need to do the research to be sure, but I know Tremek make a 5 speed that many have swapped in and I also believe there is a small case 6 speed made that will fit without tunnel mods. There are several companies that offer transmission upgrades. I suggest you do some digging then come back to the more knowledgeable for their suggestions. Sorry I can't be more help at this time.

http://www.mustangandfords.com/how-to/drivetrain/1408-simple-five-speed-swap-for-your-1971-1973-mustang

https://www.moderndriveline.com/shop/solutions/engine-solutions/71-73-mustang-5-6-speed-conversions/

Edited by Stanglover
Found information useful to poster.

Geoff.

 I learn something new every day!

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54 minutes ago, Stanglover said:

I wasn't going to chime in on this as I've not done the swap to mine. I think you'll need to do the research to be sure, but I know Tremek make a 5 speed that many have swapped in and I also believe there is a small case 6 speed made that will fit without tunnel mods. There are several companies that offer transmission upgrades. I suggest you do some digging then come back to the more knowledgeable for their suggestions. Sorry I can't be more help at this time.

http://www.mustangandfords.com/how-to/drivetrain/1408-simple-five-speed-swap-for-your-1971-1973-mustang

https://www.moderndriveline.com/shop/solutions/engine-solutions/71-73-mustang-5-6-speed-conversions/

Thanks for info. Appreciate it

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I installed a TKO-600 from Tremec with no modifications to the tunnel. You just have to find the right bellhousing to match your engine. In my case, it increased the drivetrain angle though.

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20160929_171923_edit2_small.jpg

 

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump

Strange center section with Truetrac, 3.5 gear and 31 spline axles, 4-wheel disc brakes

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I put a Tremec T56 Magnum 6 speed in mine and it fit with no mods to anything in the tunnel or shifter location. As Tony mentioned, you'll need the right bell housing, crossmember and driveshaft of course. 

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I did the Tremec 5 speed conversion with the kit from MDL about two years ago.  No holes had to be drilled and I was able use the OEM shifter boot once I found a round shifter from Hurst that looked just like the OEM.  My car was originally a 4 speed car so the conversion was easy.  The only thing I had to send out was getting the driveshaft shortened (I forget how much). The kit is vary complete and includes:  transmission, bell housing, clutch, flywheel, cross member, speedo-cable, clutch lever, slip yoke, shifter handle and knob plus all the hardware and brackets required.  It was the details like the cable for the clutch that replaces the "Z-bar" which made for much smother and less effort clutch engagement that made the kit worth it.  While I had the clutch/brake pedal assembly out I also replaced the bushings. Here are some pictures...

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