In 2004, I installed my 261 including the 4-speed to the bellhousing. Over the 17 years I've forgotten just about everything. I used a tranny jack then and I think I also used the 1/2 inch alignment pins screwed into the bellhousing because I found them in my garage. One has a slot cut on the end for a screw driver; the other does not.
The first picture shows them (6 1/2" and 2 3/4"). A shorter one is necessary because of a hump that sticks out on the tranny and blocks the removal of a pin that's too long.
My problem is the short pin will be too long to be removed. The 2nd picture shows it hitting that hump long before it can be removed.
The tranny jack was really nice but I'm using a come-along with a 4x4 sticking out both windows this time.
Questions are: Could I have actually used the shorter pin either in the upper holes (screwing into the bellhousing) or the lower holes (screwing into the tranny)? What lengths have you used?
34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
I think pins must be cut to length as the process moves along. Find some young, strong person to lift it in for you. I used to use a scissors jack on a roller skate, that still works.
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
Cut another inch off the short pin, or put it into the lower right threaded hole in the transmission. Be sure it's short enough to clear the pressure plate if you use the lower bolt hole. One pin should be plenty, once the trans main shaft enters the clutch plate. The other one is just a placebo. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.
