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Author: Subject: 4 Speed gearbox options
Dopdog

posted on 28/8/18 at 06:09 PM Reply With Quote
4 Speed gearbox options

Of course we have the good old ford box but what other alternatives are out there for a front engine rwd car.
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rusty nuts

posted on 28/8/18 at 06:41 PM Reply With Quote
Would have thought it would depend on which engine you are using or is there an adaptor plate or bell housing available to suit? RX7 , MX5 or BMW boxes may work?
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snapper

posted on 28/8/18 at 07:08 PM Reply With Quote
Any very old car
Triumph
Morris
Etc





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snapper

posted on 28/8/18 at 07:09 PM Reply With Quote
Why 4 speed?
You could put a 5 or 6 speed box in and not use 2 of them





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Dopdog

posted on 28/8/18 at 07:13 PM Reply With Quote
Thinking of a 750 formula car. They use the fiat fire engine and the regs say 4 speedbox. Just after ideas of what’s out there
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russbost

posted on 29/8/18 at 07:25 AM Reply With Quote
For 750 formula Reliant springs to mind, but could you not use a modern, lightweight box & simply remove a ratio?





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Dopdog

posted on 29/8/18 at 10:22 AM Reply With Quote
quote:
Originally posted by russbost
For 750 formula Reliant springs to mind, but could you not use a modern, lightweight box & simply remove a ratio?

That is a good idea I did not think of that.

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Mr Whippy

posted on 29/8/18 at 11:20 AM Reply With Quote
or block the gate for 5th
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OwenSP

posted on 25/10/18 at 07:50 AM Reply With Quote
quote:
Originally posted by snapper
Any very old car
Triumph
Morris
Etc


Anyone know of a company that do bellhousings to mate a Triumph box to a crossflow engine?

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Mike Wood

posted on 25/10/18 at 09:23 PM Reply With Quote
Something that you can get suitable ratios and a close ratio gear-set which will go with what rear axle ratios you can get. Sounds like a Ford Escort/4 speed Sierra or MG Midget gearbox (Ford probably can be made stronger than Midget) - Midget parts from Peter May Engineering or Magic Midget; Ford gearbox bits from Burton Power. And who makes adaptor plates?

Lovely rwd Datsun and Toyota gearboxes from the 1960s/1970s will be rare and difficult to get parts for.

Are you allowed straight cut gearsets?

Have you tried posting for ideas on the main 750 Formula forum, as well as the historic 750 forum?

Cheers
Mike

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steve m

posted on 26/10/18 at 07:27 AM Reply With Quote
Have you discounted the type 2 Ford box? its a 4 speed, and fits to a Ford engine without any mods

Ive used them for years and would never change it for a 5 speed, theres no need





Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at




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ettore bugatti

posted on 26/10/18 at 08:02 PM Reply With Quote
Austin A35/40/ Sprite/ Minor gearbox used to an alternative to the Reliant boxes in the Formula 750 racing.
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Sam_68

posted on 26/10/18 at 08:19 PM Reply With Quote
quote:
Originally posted by Dopdog
quote:
Originally posted by russbost
For 750 formula Reliant springs to mind, but could you not use a modern, lightweight box & simply remove a ratio?

That is a good idea I did not think of that.

Purely in terms of size & weight, you won't find anything better than the Reliant box - they're incredibly compact and lightweight.

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snapper

posted on 26/10/18 at 08:45 PM Reply With Quote
Aluminium Type 9 casing with the Aluminium Type E tail housing because a 5 speed Type 9 is a Type E with the 5th gear in a longer tail housing





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