tranny swapin'

Website · Post by **wideblock** » Fri Aug 06, 2004 7:08 pm

ok, im going back and forth on a few idea, so i figured id throw it up for a few opinions and see if you guys might have something better in mind. the crew has a 435 and a 4.10 dana rear, so she aint all that great on the freeway. since the majority of its driving will be around town empty, or on the freeway between here and houston with at most my sweptline bed trailer in tow, i really dont need the house pulling grunt i get from this combo. any way, heres some thoughts. tell me what you think, and what problems, if any, i may run into with any of these. by the way, the truck is a 69 crew cab, the engine is a 72 360.

idea #1= rebuild the 435, swap the rear gears to around a 3.54 ratio.

idea #2= leave the 4.10's, swap in an 833 4spd with over drive manual tranny.

idea #3= swap in a 727 with a mild stall and swap to 3.54 gears. on this idea i already have access to a 67 d200 single cab long bed with the full auto set up, i know the shifter wont work, but what other headaches might i encounter going from a 67 to a 69?

Post by **FredM** » Fri Aug 06, 2004 7:23 pm

I'd think the rebuild and 3.54 gears would be best

have though about asking about the 833 for my 1/2 ton, don't know if it's
heavy duty enough for a 3/4 ton

auto-- you would need shifting linkage, driveshaft work, and i think
a lot of changes with cross members

check with a trans shop there you might find a rebuilt, then all you would have to do is the swap on the trans.
you might find a rear end some day and then just another swap,
lot easier the taking it out rebuilding, then replacing

Website · Post by **wideblock** » Fri Aug 06, 2004 7:33 pm

the 833 came in 3/4 tons from mid 70's thru late 80's i think, not sure on the years, but i know dodge used them. the van this engine came out of was an extended @#% 3/4 ton and it had the 833 in there. so id imagine it would hold up ok. dave did the swap in his 71 shorty 1/2 ton, says its an easy swap with minor driveshaft work. and i know he worked the hell out of that truck without any tranny problems.

as far as the auto, i have all the parts available except an atuo drive shaft for a crew cab, so i might have to have the drive shaft modified on this idea as well.

as far as swapping in a different rear end rather then rebuild, well, for my own piece of mind id rather rebuild it my self and know its right and strong. even if i buy a 3.54 geared dana 60, im still gonna rebuild it. i already checked all the tranny shops around here, nobody has any 435's or 833's laying around, but i did find one hell of a nice built 727 for $1000. but thats a bit out of my budget right now.

Post by **FredM** » Fri Aug 06, 2004 7:47 pm

where can I find information on the 833 on line
heck I thought it was a car trans and light pickup

Website · Post by **wideblock** » Fri Aug 06, 2004 7:57 pm

good question, i got all my info from dave

RussRoth · Post by **RussRoth** » Fri Aug 06, 2004 8:41 pm

Trey,

If I am not mistaken the OD 833 is an aluminum case and not as strong as the cast iron one. Moparts.com has had several discussions about those and I seem to remember some trouble with one of the shafts getting wallowed out in the case. Seems like it had something to do with the OD and the aluminum case together. I have seen one or two in PU's in the wrecking yard but I think they were 1/2 tons.

Website · Post by **wideblock** » Sat Aug 07, 2004 12:12 am

you are correct russ, the 833 is an aluminum case. and im not 100% positive they came in 3/4 tons. my uncle had a early 80's crew cab 3/4 ton back in the day that was 5 speed, and i remember it being an aluminum case when we did the clutch change. but i dont know for sure if it was an 833 or something a bit beefier.

Post by **Hobcobble** » Sat Aug 07, 2004 7:55 am

I'm with Fred on this one.... go with the 3:54's... that way, you're only
working on the axle.... not the rad, driveline, tranny, shift & kickdown
linkages, steering column, etc. etc.. For half the $$ spent on all the
above, you could have the gears done by a shop in a couple of hours.
John

Website · Post by **wideblock** » Sat Aug 07, 2004 11:11 am

good point, the gear swap is the most cost effective. but the tranny is in need of at least a good going thru and freshening of a few parts. im not sure how expensive it is to get the 435 rebuilt, so it may be most cost effective to swap in the 5speed, if i can get the info saying its tough enough. or find one that is tough enough. the greatest thing is having this 360 gives me tons more options then i would have ever had with the poly motor in my 66. you know, with the 5 speed and 3.54 gears id really be able to fly down the freeway!

Post by **Hobcobble** » Sat Aug 07, 2004 1:13 pm

If the 5 speed is also used, you might just be swapping problems. If the
shifter on your NP is just bouncing around a bit, why not pop the top off
and check the top end first? That NP435 is one of the best all around
gear boxes made... your problem may even be as simple as a tired or
broken shifter spring.... you never know

John

Post by **FredM** » Sat Aug 07, 2004 1:52 pm

I too think the 435 is good also 445.
I have had problems with the 435, 2 of them, synchro's
and main shaft bearings, but they had near 400 thousand miles on them.
could it be the 28,000 pound loads wtih 400+ hp or just lots of turning
darn light duty stuff in the 1 tons

Website · Post by **wideblock** » Sat Aug 07, 2004 5:37 pm

anyone have a source for parts for the 435? my shifter isnt just a little loose, damn thing moves side to side about 4 inches at the shift knob when in gear. the tranny seems solid, and shifts real good, its just the shifter the way it is, you got to feel your way thru the gates.