6.2l diesel + T10 tranny

[spencerwescott]

yeah I know it dumb and really dumb......
but i'm just messing around with some stuff I have can I run a 6.2l with a 10.5" clutch, a t10 4speed and make this work at all?

thanks for any help

I know the started wont fit unless I grind the bellhousing

 

[diesel4me]

Other than the starter it might work OK,provided the 10.5" pressure plate bolts up to the flywheel,I think they are the same bolt pattern as a 11 or 12" one..the 10.5" clutch has a lot of surface area,more than most people think too,and will probably hold up OK.....maybe if you used a cast iron bellhousing off a pre-73 GM truck you could use the starter with the 3 bolt nose that bolts to the bellhousing instead of the engine..

A few non GM manual trannies will bolt up to a GM bellhousing and have the same input shaft splines and length...some of the old Ford top loader 3 and 4 speeds used in Mustangs were also used in some mid 60's Buicks and Pontiacs,and GM used a version of the A-833 Mopar 4 speed overdrive behind some 6.2's in the early 80's..

I wish GM had put the M-22 Muncies in older 4x4 trucks,for street use they would rule,the gear spacing and full synchro in all forward gears would make one easier to drive in city traffic..I know a guy who adapted a Clark 5 speed from a 60's school bus to his '66 GMC 4x4 ,it wasn't that hard seeing it bolted up with no mods,and he had the divorced Rockwell transfer case,all it required was a custom driveshaft between the tranny and transfer case,that he made from the original one off the bus..

He also was one of the first 4x4 enthusiasts around here to try putting an Alison automatic from a 70's bus that had a 350 V8 into his '74 4x4 pickup,using the same type of Rockwell transfer case behind it..

 

[dyeager535]

Did GM use the 10.5" clutch in any trucks?

I'd be a bit worried that the weight of the trucks would be too much for the clutch and/or trans itself. Until GM started using the 6 speed in the Camaro's, there wasn't a GM car that I'm aware of, that had a manual that would hold up to any power, and that was cars. Was the light duty manual offered in the trucks a car trans originally? I remember seeing an EARLY 1980's chev truck with one of the lighter duty trans in it, only one I have ever run across. Even the Muncie's are now considered obsolete, for one the cast aluminum housing moves around too much, for another, 4 speeds lol.

 

[diesel4me]

GM used Saginaw and Muncie 3 speeds ,and some 70's trucks had Tremec 3 speeds --
--I had a '75 2wd K5 with a Tremec,it had a 5th bolt hiding above the tranny,I remember prying a half hour trying to get the tranny out after removing the other 4 "usual" bolts holding it to the bellhousing ,until I realized there was a 5th bolt on the top side....I later installed a Saginaw 4 speed from a '74 Vega into it and I liked that tranny a lot..

Some of the 60's and 70's trucks with 230 and 250 straight sixes used the 10.5" disc setup,but not many and probably only half tons,and very few in 4x4s,I did see a few '72 K5's with a 3 speed Muncie coupled to a Dana 20 transfer case and a couple of 67-69 4x4 pickups with that setup too,two were sixes and one had a 307 V8 factory--the shifter was a weird arrangement of rods that went thru the t-case adapter if I remember right..

..I think the trucks with the 10.5" clutch had the smaller flywheel with 153 teeth too,and a "straight across" bolt pattern starter..

As for durability I never saw that many 3 speeds blow up,the few I heard of that did had to be whipped badly before they failed..Muncies used to hold up fairly well but at the drag strips they often blew synchros when someone missed a shift speed shifting them..I dont know how long one would last in a truck used to tow or plow but probably be OK as long as you didn't whale on it constantly..

 

[spencerwescott]

Did GM use the 10.5" clutch in any trucks?

I'd be a bit worried that the weight of the trucks would be too much for the clutch and/or trans itself..

thanks all for all the help, I think this might work the info from you guys really helped

yeah it totally agree it wouldn't last in truck im just throwing in it in my hot rod for cruising

 

[b454rat]

Buddy had a truck with a T-10, truck had MANY owners who didn't treat it kindly and tranny never died but he motor did numerous times before finally being junked or parted out.

If a 6.2 shares the same bolt pattern as a 350 flywheel, then you could get a 153 tooth flywheel for a G-body. I don't think that you would have any problems with the tranny, the 6.2 doesn't make enough power to hurt anything!!!!

 

[spencerwescott]

Buddy had a truck with a T-10, truck had MANY owners who didn't treat it kindly and tranny never died but he motor did numerous times before finally being junked or parted out.

If a 6.2 shares the same bolt pattern as a 350 flywheel, then you could get a 153 tooth flywheel for a G-body. I don't think that you would have any problems with the tranny, the 6.2 doesn't make enough power to hurt anything!!!!

ha yeah a 6.2 cant really hurt anything but i think that i might need to use a 6.2 flywheel because they might be balanced special

is a 153 g body a diesel one?

there was a 5.7l diesel in the cutlass but i don't know if that is a sbc

 

[diesel4me]

The 5.7 or 350 cubic inch diesels were Olds based engines (and GM's worst diesel as well )..I dont think a flywheel off one of those would fit or be balanced right even if one could be found,hens teeth would be more common!..

I'm not positive but a manual flywheel for a 6.2 should bolt up to a pressure plate for the smaller disc setup,I think most if not all pressure plates had the same bolt pattern,I could be wrong though...if they were maybe you could drill and tap holes where they need to be if there is enough meat where they need to go..

 

[spencerwescott]

awsome, thanks

my only fear is that the 6.2 flywheel wont fit int he bellhousing it might be bigger, is it?

 

[diesel4me]

The 6.2's in the 80's trucks had 11" or 12" clutches with the SM465 or A-833 Mopar 4 speed overdrive some had factory,so I dont see why a smaller clutch wouldn't fit..provided it'll bolt up..most of the 10.5" clutches used a diaphram pressure plate with "flat" fingers and needed the longest throwout bearing out of the 3 different length ones they had....

My thoughts are you should be sure the disc surface will mate up with the flywheels surface ,it might not be flat where it needs to be for the smaller disc...I have not seen a flywheel for a 6.2 standard so I cant say if it would or not..I dont see why a 11 or 12" clutch couldnt work with a T-10,really..