Tranny on E-bay, modded 901 Options

[guiltless]

I am not interested because I am going with a suby tranny, but I thought someone might be interested.

901

[Aaron Cox]

intermediate plate looks scary.

[Mueller]

QUOTE (Aaron Cox @ Dec 1 2005, 10:11 PM)

intermediate plate looks scary.

as long as it works...not sure why he didn't profile machine it all around, but I don't think it looks that bad......heck the plate is worth the current bid price alone (if made correctly)

[Rand]

Interesting... he drag races his 914 v8 and is going to "outfit the car with a Powerglide two speed automatic transmisson and four link rear suspension."

[Aaron Cox]

whats with the bracing? never seen a case explode outward....
(IMG:http://i14.ebayimg.com/01/i/05/90/f8/d7_12.JPG)

and how do you 4 link a non solid rear axle car?

[Rand]

And how do you hook up to the powerglide tranny?

[Dave_Darling]

QUOTE (Aaron Cox @ Dec 1 2005, 09:25 PM)

whats with the bracing? never seen a case explode outward....

They do, however, flex in this area. I've read about it elsewhere--this is one of the areas that 901-based gearboxes (and 915-based gearboxes, for that matter!) can flex. They don't explode there, but the case moves enough that the internal bits get mis-aligned. Which leads to Very Bad Things, especially because it happens under extreme loads. I was under the impression that other stuff generally failed in the 901 before that became much of an issue, so maybe he's got all of that "other stuff" dealt with.

No clue about the powerglide and four-link, though. I bet it requires lots of cutting and welding!!

--DD

[skline]

My guess is he is not running a 914 at all but some kind of kit car. Just a guess.

[reedhmb]

The corvair automatic was also called powerglide?

[jimkelly]

I too saw this tranny on ebay and was intrigued. I emailed the seller and have since - with another 914club member (Root) visited the owner who is local to us. Not only does he has a very nice working area - his car is pretty cool. Being a V8 conversion wanna be - I was very impressed.

Anyway I will expain what he is doing. Dave is correct - the metal corsett keeps the case from flexing thus keep the innards in place thus avoiding damage to the tranny to a great extent. The intermediate plate is almost completely the maximum thickness thus acheiveing similar benefits. Glenn has also found an ingenious solution for cv strength as well. Despite all this I beleiev he feels he needed an even stronger tranny for his 1/8 mile drag racing penchant.

He has removed the entire rear of his car from just after the firewall - everything. he is gonna weld a custom chassis to hold his sbc v8, powerglide tranny, a custom transfer case, which will feed two drive shafts and two Dana dif's that will be mated by a steel bar of some kind to fuse the difs into a solid rear axle which will hang from a four bar suspension.

Attached is an image which is pretty close to what he is planning for the rear half of his 914 .

(IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif)

[jimkelly]

I still don't know how to add an image.

Why isn't it simpler and why can't the club accpet any size image and then reduce it accordingly as does craigslist - as I posted my first for sale there today and posting images was a SNAP!

I put this in my blog and pasted the url below.

http://www.914world.com/bbs2/uploads/blog-1...-1134940167.jpg

Jim

[bondo]

Chain drive! Oh no!

High torque chain drives often fail... Seen it happen at Electric Vehicle drag races.

[Dr. Roger]

if chains are good enough for tractor pull competition, they're good enough for me.

still though..... (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif)
the powerglide has the great first gear and are VERY strong.

like most things. i gotta' see it to believe it. (IMG:http://www.914world.com/bbs2/html/emoticons/cool_shades.gif)

[jimkelly]

Two links I just found - FW-they're-W ...

http://www.freepatentsonline.com/5169367.html
http://www.jrdragsterplus.com/osd.htm

Jim

[MattR]

QUOTE (Dave_Darling @ Dec 1 2005, 10:18 PM)

QUOTE (Aaron Cox @ Dec 1 2005, 09:25 PM) whats with the bracing? never seen a case explode outward.... They do, however, flex in this area. I've read about it elsewhere--this is one of the areas that 901-based gearboxes (and 915-based gearboxes, for that matter!) can flex. They don't explode there, but the case moves enough that the internal bits get mis-aligned. Which leads to Very Bad Things, especially because it happens under extreme loads. I was under the impression that other stuff generally failed in the 901 before that became much of an issue, so maybe he's got all of that "other stuff" dealt with.

(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif)

Think about how important pinion depth is. It is set by really small gaskets. A few thou in that area is critical. Under stress, a mag case will flex. It looks like a really good idea to brace that area.

[Aaron Cox]

QUOTE (MattR @ Dec 18 2005, 02:39 PM)

QUOTE (Dave_Darling @ Dec 1 2005, 10:18 PM) QUOTE (Aaron Cox @ Dec 1 2005, 09:25 PM) whats with the bracing? never seen a case explode outward.... They do, however, flex in this area. I've read about it elsewhere--this is one of the areas that 901-based gearboxes (and 915-based gearboxes, for that matter!) can flex. They don't explode there, but the case moves enough that the internal bits get mis-aligned. Which leads to Very Bad Things, especially because it happens under extreme loads. I was under the impression that other stuff generally failed in the 901 before that became much of an issue, so maybe he's got all of that "other stuff" dealt with. (IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) Think about how important pinion depth is. It is set by really small gaskets. A few thou in that area is critical. Under stress, a mag case will flex. It looks like a really good idea to brace that area.

that area has nothing to do with pinion depth.... but maybe ring gear walking....

if the case "expands" there (flex) then how would that change the amount pinion depth???

maybe the ring gear can wak outwards?

[MattR]

QUOTE (Aaron Cox @ Dec 18 2005, 01:54 PM)

that area has nothing to do with pinion depth.... but maybe ring gear walking.... if the case "expands" there (flex) then how would that change the amount pinion depth??? maybe the ring gear can wak outwards?

Reread what I said. I just said the tolerances in there are really tight. A gasket with only a few thou thickness makes a huge difference on how the transmission works.

[Aaron Cox]

QUOTE (MattR @ Dec 18 2005, 03:04 PM)

QUOTE (Aaron Cox @ Dec 18 2005, 01:54 PM) that area has nothing to do with pinion depth.... but maybe ring gear walking.... if the case "expands" there (flex) then how would that change the amount pinion depth??? maybe the ring gear can wak outwards? Reread what I said. I just said the tolerances in there are really tight. A gasket with only a few thou thickness makes a huge difference on how the transmission works.

misread. good point. tolerances are tight in critical areas.

sorry.

[Glenn.Payne]

if chains are good enough for tractor pull competition, they're good enough for me.

still though..... (IMG:style_emoticons/default/blink.gif)
the powerglide has the great first gear and are VERY strong.

like most things. i gotta' see it to believe it. (IMG:style_emoticons/default/cool_shades.gif)

Now you can see it. GP

[BMartin914]

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