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#1 |
Registered User
Join Date: Jul 2007
Location: Johnson City, TN
Posts: 97
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Munice 4sp or Super t10 Towing camper ok?
Hey guys I am about to swap in a new 4sp in my 72. it will either be a Munice M21 -m22 or a super t10 .. I have a mild 400sb.. I will not be towing anything over a small camper or bass boat (say less thank 5k).. will this tranny hold up under normal
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#2 |
Registered User
![]() Join Date: May 2016
Location: Sackets harbor ny
Posts: 282
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Re: Munice 4sp or Super t10 Towing camper ok?
If you're running 373 gears or higher. You should be OK. The M 21 is what I am running. First gear is a little steeper. It is a close ratio tranny. Do some searches and you should find more info. Good luck.
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#3 |
Registered User
Join Date: Jul 2007
Location: Johnson City, TN
Posts: 97
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Re: Munice 4sp or Super t10 Towing camper ok?
I have 3.73's .. Thanks for the info I just didn't want to put to much pressure towing on the tranny. Do you tow with yours alot ?
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#4 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,396
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Re: Munice 4sp or Super t10 Towing camper ok?
I personally would recommend a wide-ratio 4 speed so that you have decent off the line torque multiplication. That said, if you can find an M-22 you can afford, I highly doubt you will break it, given the number of 454 Chevelles that have had a zillion high power shifts thrown at them. Noisy as all get-out, though. I don't remember if you can get them with wide or close ratio gearing, though. I think they were all close ratio, but people are always making new gears. My knowledge in this area is 40 years old, when it comes to specifics.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#5 |
Registered User
![]() Join Date: Mar 2014
Location: Spring Hill Kansas
Posts: 209
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Re: Munice 4sp or Super t10 Towing camper ok?
either trans will be fine. I ran a super T10 back in the day, hooked to a 427 with no issues. your biggest issue may well be finding one
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#6 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: Munice 4sp or Super t10 Towing camper ok?
I broke my 2.64 1st gear T-10 in my Camaro 2 years ago due to stupidity.... I replaced it with a 2.42 first and miss the lower first gear. A lot. My car has 4.10 gears and 29" tall tires.
IMO, you will be MOST unhappy with an M21 and its 2.21 first gear in a truck. Personally, if you want a street/strip style truck I would do a T56 swap. Then you could run 4.56 gears which to me would be an excellent combo with the .5 6th gear. But if you want a truck/truck then the SM465 would be my choice. For utility, you just can't beat the granny first. My '79 CJ-5 has 3.54 gears and a 2.97 1st gear and 33" tall tires. And to pull my bass-boat up the ramp I have to use low range. Which with the Dana 20 means I STILL have last gear then first high range in an SM465.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#7 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,608
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Re: Munice 4sp or Super t10 Towing camper ok?
Rebuilt's are available.
The t 10's work better if you have higher rear gears like 3.08's. The m21 and m22 having 2.20 first gear like a 3.73 gear but have been run with 2.73 rear gears. My first 70 chevelle LS6 had a m22 with a 2.73 gear from the factory with a trailer towing package on it. THe original owner like to pull his boat to the lake and preferred to do the 90 miles at speed. Trans available here. http://www.garagemotorsports.com/muncie.htm And check out Autogear for wide ratio muncies. http://www.autogear.net/motorsports/ |
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#8 |
Registered User
![]() Join Date: May 2016
Location: Sackets harbor ny
Posts: 282
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Re: Munice 4sp or Super t10 Towing camper ok?
I towed years ago with The M 21. Didn't have any problem. As long as you don't tow over capacity. I haven't towed with this transmission yet. Still putting it back together. The truck that is.
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#9 | |
Registered User
Join Date: Sep 2015
Location: danbury, ct.
Posts: 568
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Re: Munice 4sp or Super t10 Towing camper ok?
Quote:
![]() Last edited by Ken B; 06-08-2017 at 06:20 AM. |
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#10 | |
Registered User
Join Date: Sep 2015
Location: danbury, ct.
Posts: 568
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Re: Munice 4sp or Super t10 Towing camper ok?
Quote:
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#11 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Munice 4sp or Super t10 Towing camper ok?
People used to tow all the time with the 3spds. Any of these car transmissions have a better 1st for towing/hauling. My little '67 will have a car 4spd, hitch, lowered suspension that can carry, and a bed that will get scratched.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#12 |
Registered User
Join Date: Jul 2007
Location: Johnson City, TN
Posts: 97
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Re: Munice 4sp or Super t10 Towing camper ok?
Wow. I really appreciate all the responses. I look forward to this swap in very near future. Can't wait to make this my daily and tow pig
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#13 | |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,717
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Re: Munice 4sp or Super t10 Towing camper ok?
Quote:
3.73 was the smallest numeric ratio you could get from GM factory with the 2.21 first gear M21/M22 and 4.10 were better. 4.56 more so. It was built to be a road race transmission and still can lay claim to the closest ratio factory 4 speed ever made. But that's not worth a flip on the street. I don't have much experience with GM 3 speeds, but LOTS with the jeep 3 speeds. And even with 4.88 gears in my '44 and 5.38 in my '52. They need more gear except at speed. Which you don't really want to be at. Terrifying! http://www.roadkillcustoms.com/hot-r...#axzz4jYTMo8Qc
__________________
44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#14 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,608
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Re: Munice 4sp or Super t10 Towing camper ok?
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