What have you done to your square lately??

[74 Shortbed]

Check for sloppy hinges, bad weatherstripping will cause rattling too. Check latch adjustment also.

 

[Camar068]

Nothing directly to the truck. Bought a pair of doors complete (electric, only surface rust) w/o the panels for $150. One had a mirror, he had a spare one that has spray paint flaking off it. Also got a steering wheel, set of tail lights, and a spare inside tail light housing (w/e it's called lol) for $10.

Here's the cool part. He's also got a 90 RV frame. It's got a complete (can start up) 454 with a th425 and gear vendor. I've got dibs on the GV for $200 when he takes it off and the radiator for $100.

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[CSFJ]

I thought the th425 was the front wheel drive trans they used behind the monster block Cadillacs, and Olds Toronados? Or am I miss-remembering?

 

[Honky Kong jr]

I thought the th425 was the front wheel drive trans they used behind the monster block Cadillacs, and Olds Toronados? Or am I miss-remembering?

You are correct.

 

[Camar068]

They were used on the RV's as well, from what I'm reading on the web. Pic I have of the pan.

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[CSFJ]

That's a th400. Same thing that's in my truck. Just went out to snap the pics.

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The motorhomes that came with the th425 were the GMC front wheel drive models like they used in the movie 'Stripes".

 

[Camar068]

lol u'd think i'd know a 400 by now. Guess not.....it's just different to me. Never owned one or took notice to one. I did do a search and some RV's came with 425's so I went on his word. Are the pans the same between the 2 maybe?

 

[Honky Kong jr]

That looks like my pans. I have 2 HD TH400s out 1 out of 1ton van and 1 out of a 1 ton C&C. Both were fixed yoke.

 

[74 Shortbed]

Truck pans are deeper than passenger car pans, on the TH425 the planetary gears is "reversed" and the one-way clutches freewheel in the opposite direction..

 

[bucket]

I think I remember Hotrod saying in the past that the th400 used in RVs often had a few different internal parts.

 

[74 Shortbed]

Some also had straight cut planetary gears..

 

[Honky Kong jr]

Some also had straight cut planetary gears..

Yup the beefy boy ones in the Winnebagos did I don't know motor home classes that's above my pay grade but the bigger ones

 

[74 Shortbed]

Yup the beefy boy ones in the Winnebagos did I don't know motor home classes that's above my pay grade but the bigger ones

Yep, reason for the straight cut was to eliminate the thrust to the back of the case, it was preventing lubrication to the rear case thrust washer and wiping it out, it was later remedied by replacing the thrust washer and plate with a TH350 pump bearing and is standard now in any rebuild, there's arguments on the strength of the straight and helical gears too, some say they're stronger but they have less gear contact than the helical, and it's common to put 1200-1400hp to them with helical gears, soooo???

 

[Honky Kong jr]

Yep, reason for the straight cut was to eliminate the thrust to the back of the case, it was preventing lubrication to the rear case thrust washer and wiping it out, it was later remedied by replacing the thrust washer and plate with a TH350 pump bearing and is standard now in any rebuild, there's arguments on the strength of the straight and helical gears too, some say they're stronger but they have less gear contact than the helical, and it's common to put 1200-1400hp to them with helical gears, soooo???

Most crane gearboxes are helical cut gears. Older ones will be straight cut but noisey as ****. Every once in a while I come across a herringbone cut set of gears in a gearbox but it's kinda rare due to expense of machining.

 

[74 Shortbed]

Most crane gearboxes are helical cut gears. Older ones will be straight cut but noisey as ****. Every once in a while I come across a herringbone cut set of gears in a gearbox but it's kinda rare due to expense of machining.

Yeah, they are noisy, knew a guy that had a motorhome with one you heard it all the time very irritating to say the least.. Haven't seen herringbone cut gears in quite a while didn't think they even made them anymore..