th350 to sm465.

[76 k10]

I am doing this swap on my truck and i have all the parts to do it. i was jw how long do you think it will take me to do this. i no these trucks pretty good and i have all the tool to do so and i no how everything gos togather and how take it off and put it pack on. i just need a idea on how long my truck is gonna be down for

[zieg85]

A good days work is my guess.  My least favorite part is the clutch pedals/under dash stuff.  Hope you thought of the rise in the hump when using the SM465.

[swcu_21]

I made a similar change to the sm465 and i had to put a new piece of sheet metal in, the old hump was too shallow. Plan on taking the seats out too or you will have to cut up your carpet.

Good Luck

[VileZambonie]

I am curious why you would want to go to the SM465?

[76 k10]

I am curious why you would want to go to the SM465?

well cuz its strong and has that low 1st gear. and the motor thats in my truck now has no low end and i kinda want that granny gear. o ya and im building a 427 for my truck and i need something that will hold up you no. but is the a reson y i should do this swap? jw

[76 k10]

I made a similar change to the sm465 and i had to put a new piece of sheet metal in, the old hump was too shallow. Plan on taking the seats out too or you will have to cut up your carpet.

Good Luck

what carpet? lol its a mud truck.

[Irish_Alley]

what ratio you have in the rear?

[VileZambonie]

I hate that trans and find 1st gear useless for anything other than off road creeping or pulling something like a stump out lol. I would look at your rear gear ratio first.

[Irish_Alley]

I hate that trans and find 1st gear useless for anything other than off road creeping or pulling something like a stump out lol. I would look at your rear gear ratio first.

x2
i have it in my 79 4x4 the gearring sucks even in the mud

[zieg85]

I hate that trans and find 1st gear useless for anything other than off road creeping or pulling something like a stump out lol. I would look at your rear gear ratio first.

I love mine, could have something to do with my 454 engine and 3.21 gearing.  Gets the heavy loads moving without any clutch wear.  Truck still has its original clutch after 140K miles and about 60K of them pulling a 35 ft 80's vintage 5th wheel.

[swcu_21]

Sorry forgot a lot of posters here frequent the mud.

I don't care for mine. It was a quick fix when my automatic went, but thats it. Even when i lived in the country I rarely used the compound low and now I never do. With the 2.73 rear end and a slightly modified 350 the RPMs at 70 are too high for me. I would try a 4 speed with a little higher first and closer gears for mud.

[Captkaos]

should be about a days works to swap it out, maybe 1.5.

I love that transmission.

[76 k10]

im running 12 bolt with 4.11s and a dana 44 with 410s

[VileZambonie]

I think I need to do a simple write up on how to calculate driveline overall ratio's. The Granny Tranny has never proven to me to be a useful practical trans for any street use. I don't see why anyone would favor this trans over all of the other options out there.

[frogman68]

I think I need to do a simple write up on how to calculate driveline overall ratio's. The Granny Tranny has never proven to me to be a useful practical trans for any street use. I don't see why anyone would favor this trans over all of the other options out there.

I like it for the simple reason that someone that doesnt know how to drive a stick can just dump the clutch in first and it wont die