Competition How about this transmission in my puller???

[F8LDOSE]

First guys I want to say please don't laugh at this idea because I honestly think it will work, and I know none of you know me and I think of some silly stuff. Here goes. If I can't run a manual without a blowproof bellhousing that means hello automatic. I was thinking about using a g. m powerglide this a 2 speed transmission with a 1. 76 first gear and drive. I can use a J. W blowproof bellhousing to adapt the powerglide to BB chrysler boltpattern. Then use a divorced NP 205 transfer case. You can build these trannys to be indestructable. Dragracers have been using them for years putting 1500+ hp to them. Billet shafts and the best parts will be used. As far as converter I'm not sure yet. I'm surprised nobody has done this yet in a 2wd, I think it would be awesome for dragracing a diesel as it would keep the motor at a constant rpm longer right in the powerband. I think the first 10 sec diesel ram will have a powerglide in it, laugh now if you'd like. will it work in a pulling truck??

 

[78repowerwagon]

The major problem with it is loss of OD or running out of RPM before the 1/4 mile is up. For sled pulling it would probably be OK except for drivability on the highway(lack of top speed).

 

[power grizz]

i have been told by a race transmission builder, nothing can be built to be behind a cummins and have it shift other than on a drag strip. i asked for pulling and mudracing he says nothing will hold!

not a th400, powerglide,c6 or727. as soon as you would shift under full power the torque will twist anything. an allison would maybe hold it but it is too heavy for what i need.



the transmission builder also runs a blown alchol burner with nitrous for mudracing and is very fond of what i did with my diesel mudracing.



just stay with a stick and a pulling clutch and start out in the right gear!

 

[badinfluence]

My 2 cents

I dont think a glide would hold, but I do think a TH 400 would be an option and here is why. We had a Modified pulling truck with a 572 alky injected Rodeck motor, and used a Chance built TH 400 with an Allison converter, we ran cut Cepek pulling tires and they bit the ground pretty good. We would shift under full power. The transmission held up pretty good, with that said we did a re-build on it every year. I am wanting to put a cummins in a 72 chevy with a TH 400 to mud race and pull with. So maybe I will find out if it will hold. Just my 2 cents.

Brett

 

[CUMINNTSTRKN]

the other problem with our motor's is the lack of rpm. even at 4000rpm a power glide couldn't hold, they are used to 6000+rpm. rpm = pump speed. the 47re does a pretty dang good job behind these beasts. mine has held up great sled pulling and drag racing, it took a couple of tries but i think we have it figured out.



also the np205 isn't as strong as the 241 that comes in our trucks. the gas guys use them but they don't have any torque to speak of. i have never heard of a chain breaking at the track, now some guys break the output shaft, and it's a lot bigger than the np205. now that the 03's are out i might try and get a new 272 transfer case, they are even stronger than the 241hd.





jim

 

[J.R. Adkins]

Jim,



Have you broke the 241hd?







J. R.

 

[CUMINNTSTRKN]

jr



i'm still on my ld 241, but i figure i will go straight to the 272.



jim

 

[lgibson]

I am sure a TH400 would hold up with the Allison Convertor and Straight cut gears out of a Motorhome. But the 47RE built right seems to hold up pretty good.

 

[power grizz]

th400 behind a cummins?????

if someone would find a transmission builder who would make a th400 handle 400hp and 1500 tq and shift it from first to second to third, while pulling 40000 lbs or mudracing turning 38" boggers, i would be VERY INTERESTED and would even consider buying one soon.

i dont think it would last a four month race season.



the big pullers are running more power than i and they mostly have sticks(dont want to say all pullers, i dont know them all).



and comparing diesels to gassers is like comparing apples to onions!



not trying to say it cant be done, my transmission guys say it wont hold and if it does hold, i would have to tear it apart every couple of runs to replace clutches or broken parts.

you can only bend a paperclip so many times before it breaks.



anybody running a np 205??? all i see for high hp truck are second gens with np 241, if they are running a 205 it has to be a ford case with the heavy input. but i never heard of anyone running one yet.



any info would be appreciated.

 

[CUMINNTSTRKN]

one other thing you need to think about is the rules for the class you want to run in. most of the classes say stock drivetrain. schied runs a profab transfer case, but it's a full blown pulling transfer case. it full time 4wd also. under the atpa rules they wouldn't be able to run that truck.



the np205 has much weaker shafts in it than the 241hd does. all i broke this year sled pulling was the pinion on my dana 70, so i traded it out for a dana 80.



you are right about most of them running sticks, but it doesn' t hurt to be different. as i've said the transmission that www.bd-power.com has built for me has held up very well to drag racing and sled pulling.



jim

 

[Sled Puller]

One more time-- give up on Cheby rear diffs and trannys! (and ferget the Ford 9" while you at it!)

I destroyed or was witness to every "bulletproof" part with a bow tie on it fail, on gassers.



Chevy parts are barely enough for stock gassers.



I like the reasoning about the PG though, but I have yet to see an auto get the power to the ground like the sticks.



Find the guys who build the Allisons for the semis, and see if you can apply it on the small ones.

 

[curatchko]

There are sources to build TH400's to handle over 2000 horsepower and the same for glides.



Mikes Transmissions is one.



I know you guys love your diesels, and I love mine too, but they aren't the rule when it comes to torque. There are drag cars out there makin more torque using the Glides and TH400's... .

 

[Sled Puller]

Name one drag car that weighs 8000 pounds, has over 1200 pounds of TQ, BELOW2500 rpm, and is dragging 40,000 pounds behind it... ... ... ... ..... I didn't think so.



A 500 horse 426 Hemi is lucky to have 500 pounds of tq.

 

[curatchko]

How about 3000 pounds, 2200 horsepower and 1600 lb/ft of torque running 6. 60s at 200 mph?



We ain't talkin 500 horse hemis.

 

[Sled Puller]

My point exactly, I have almost as much tq as a 2200 hp car, but I have to move 16 times the weight! And it does not roll easy.



And, I have all that tq at extremely low rpm, where does the gasser make that tq?

If I were to pull with an auto, I would come out of the hole at 60 pounds of boost, all the rpm I could manage, and EVERY BIT of TQ would be right there at the start line, trying to get that sled moving.

Two very different areas.

Would a transmission out of a car like that work?

Maybe.

But I wouldn't say it would, just because the car has more power.

 

[JIM S.]

perspective

what we need here is some perspective..... most of us figure on driveing our diesels home after the race not rebuilding the trannie after every race/pull. and low rpm tourqe (diesel) is lots different than high rpm tourqe (fully heading nitrous burner) the th400 and powerglide might be great but then again maybe not. the 47rh/re with high rpms (higher line pressure) does very well also.



anyway if non of this makes sense its because I am home sick so my brain is kind of lagging :{

Jim

 

[curatchko]

Well,



I'm not looking to debate, I'm just offering a suggestion and a source for someone who can possibly build a trans to hold.



I can say forsure that these transmissions are being used in an application with a transbrake, and a launch with FULL ON power... . the trans is seeing much the same condition that you describe.



If someone is indeed seeking this type of combination it would be worth the phone call.



Chris

 

[Sled Puller]

Point taken Chris, that guy could indeed offer us some insight into this game.



I wonder why Kondolay never stuck a PG in a truck?





Can anyone explain how a trans brake works??

 

[Excessive Force]

NP 205

I am currently running a np 205 CHEVY transfer case in my CHEVY superstock pulling truck. It has a PRO-FAB kit installed,and has held (so far) my 850 hp coming out of the hole at 7,000 rpm . I know gas is different than diesel,but there are some good part available out there like the PRO-FAB NP205 kits. I am also running a CHEVY rearend: EATON H130 !Our rules state that we can only run 1 ton driveline max,and the H130 was used in early 1 tons, (as well as C60's)and has a load bolt opposite the pinion. I guess chevy DID make a few heavy duty parts after all. There also is a lighter duty version used in the early 3/4 tons with the load bolt. Not to mention the H110,and the H135. JUST MY $1. 10 . . :-laf

 

[MCummings]

Originally posted by Sled Puller

Can anyone explain how a trans brake works??

Gene,,



Might want to watch this thread,,,



https://www.turbodieselregister.com/forums/showthread.php?s=&threadid=59510



HTH

Merrick Cummings Jr