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Old 06-09-2021, 07:21 PM
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padgett padgett is offline
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Default Most cost efficient tranny.

3000 rpm at 65 with the 3.55 is a bit much. Keep thinking about something with a long OD to get down to 2000 at 70mph.

Last time I looked wound up with a BW T5 speed that is only good for about 300 lb-ft and not 500.

Seem to be a lot of choices now in 5 or 6 speeds but what is the easiest (1st), most cost effective (2nd) manual OD trans to replace an M20 Muncie & how to identify ?

Appreciate some advice before I start looking. Is a grand or a grand and a half ballpark ?

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  #2  
Old 06-09-2021, 07:44 PM
tom s tom s is offline
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If your not going to beat on it a 3.42 first gear ST-10 and a tall real gear like a 3.08 would be good.I have one in my 62 GP with a 421HO engine and 2.68s in the back.LOVE it!Tom

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Old 06-09-2021, 08:05 PM
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Thank you but I have a correct 3.55 four pinion in it now. Besides I likes lotsa gears (and lotsa carbs) so wondering:
Are 5 or 6 speed manuals plentiful now ?
Will one just replace my M20 Muncie ?
What does a nice one (does not need to be new, just good) go for these days ?

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Old 06-09-2021, 08:21 PM
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The new Tremec TKX from Silver Sport Transmissions is worth looking into. The case should fit without modifying your floor pan. Realistically, it is about $5k all in. Depends on what you can reuse from the Muncie install.

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Old 06-09-2021, 08:22 PM
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Probably not the most cost efficient, but the best option out there right now looks like the Tremec TKX.

I have a T56, and while I like it...you have to cut the trans tunnel, build a custom cross member etc. etc. From what I have seen, this is not necessary with the TKX.

What Pontiacmark said above.....

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Old 06-09-2021, 08:24 PM
tom s tom s is offline
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Your budget will hold you back from a 5 speed im afraid.Tom

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Old 06-09-2021, 08:33 PM
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Maybeso. Not that important since doubt will make any long road trips. Just a "nice".

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