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Wed Sep 14, 2011 5:19 am

I'm building a 2276 turbo for around 275 rwhp daily street. I'm looking for a tranny that can handle that kind of power. Just to have an idea of how the car will be driven, it will be a highway warrior which means im looking for a 3.88 r/p and .82 4th gear. Long as hell but ill have the torque to pull it. I wont be killing the throttle too much but i want to know that if i dump the clutch at a light at 4000 rpm's nothing will die.

I've seen alot of pro streeters but it seems most people running those have around half the hp that im looking to get. so my next options are the pro street plus, pro comp, pro comp plus, or pro drag. I'm pretty sure the pro drag would have no problem but its outta my budget and i was wondering about the pro comp/plus. does any1 have these that can give me a review? what are the 300hp guys running? I've tried to look for transmission ratings for each of the transmissions but found nothing. can some 1 help please? thanks!!

Wed Sep 14, 2011 5:37 am

A drag tranny won't have the gear ratios for the street. Why not call Rancho and talk to them. They can build you a custom that fits your needs.

Wed Sep 14, 2011 5:40 am

Just call Sam at Rancho and tell him what you have in mind.
He will get you set up. Don't get hung up on the names (pro-drag.....etc)
Rancho has done my trannies for my 2500 tubo buggy and I would suggest ALL Weddle gears and at least a Super Diff. If you are planning on any slicks like I did you will loose the Diff sooner rather than later.
There is a Diff carrier bearing mod that can be done that supports the output shafts a lot better. Instead of doing that on my second build I decided to go Quaife Limited Slip ; which I imported and sent straight to the shop.
I also had it re-geared with 3.88 and an 82 4th with a tall 1st. It will be a good ratio for your engine. Keep the stock size pulley if you can to keep the fan speed up though. You want it at least 3000-3200 RPM at cruise with a stock ratio fan speed.
I got rid of the quick 1st since I could almost start in 2nd on the street and I was out of 1st in 3 seconds when I used it.
If I did it all over again I would go straight fot he 6 Rib bus Trans.

Wed Sep 14, 2011 5:53 am

thanks guys. i planned on at least using stock ratio 1st-3rd if not slightly taller. I'm not too informed when it comes to transmissions so i appreciate all the help.

Wed Sep 14, 2011 6:43 am

I had a local guy build mine for a turbo motor I'm building.

Here are some specs:
Rhino case
Hardened keys
Weddle Super Diff
Weddle race gears
HD side cover

Gears are as follows:
1st gear: 3.8
2nd gear: 2.06
3rd gear: 1.3
4th gear: .82
R&P: 4.12

Wed Sep 14, 2011 9:26 am

If your really serious about 275 HP and you ever plan on going to the track with slicks, then spend the money and get a Bus 091 gearbox. If this is for street only with street tires and you stay with a type I then you need the Pro Street Plus with a 3.78 mainshaft.

Wed Sep 14, 2011 12:21 pm

Its been said that the Type 1 Case is only good for 150 HP before Cracking, that is like even in 3rd or 4th gear I take it.......

Do the 091 case, you can pop wheelies on that all day that say as well.... RB

Wed Sep 14, 2011 12:27 pm

RailBoy wrote: Its been said that the Type 1 Case is only good for 150 HP before Cracking, that is like even in 3rd or 4th gear I take it.......

Do the 091 case, you can pop wheelies on that all day that say as well.... RB
I believe that is in Totally stock form.
I can assure you they can handle way more than that after being gusseted etc.

Wed Sep 14, 2011 12:32 pm

Single Side Cover is stronger than the Dual Side Cover in Stock Configuration........ RB

Wed Sep 14, 2011 12:42 pm

I put 175 through my totally stock trans case on a daily basis, they are not as weak as you think. Dumping the clutch/hard launches is what kills parts.

Wed Sep 14, 2011 1:08 pm

On my race car with 165 HP I have to replace the 3.88 R&P gear ever 150 passes because they start cracking. The gusseted case holds up fine. Drag race starts is what kills transaxles.

miniman82 wrote: I put 175 through my totally stock trans case on a daily basis, they are not as weak as you think. Dumping the clutch/hard launches is what kills parts.

I call BS. With the 14.51 ET that you posted in another thread you are nowhere near 175 HP. http://www.thesamba.com/vw/forum/viewtopic.php?p=5452211&highlight=#5452211 with 175 HP you should be 12.90's.

Wed Sep 14, 2011 5:07 pm

I have 180 HP at the wheels and have over 200 drag races (high 12's/low 13's) plus several thousand street miles on my Rancho "non-gusseted" case...no problems yet.

Previous Rancho tranny was the same (different gear ratios). Not saying I won't eventually crack the case, but I haven't yet :wink:

Wed Sep 14, 2011 5:45 pm

I am running 12.6's on a rancho freeway flyer with a SB 1st and SB main shaft. Launching on drag radials @ 6k rpm :)

Wed Sep 14, 2011 7:52 pm

my rino cased super street pluss has lasted 2 years,no problems at all execpt for the wife wants it off my bedroom dressor.

Wed Sep 14, 2011 7:55 pm

mark tucker wrote: my rino cased super street pluss has lasted 2 years,no problems at all execpt for the wife wants it off my bedroom dressor. That's it! I'm calling the Pope and putting your wife in for sainthood.

RC

Wed Sep 14, 2011 7:57 pm

mark tucker wrote: my rino cased super street pluss has lasted 2 years,no problems at all execpt for the wife wants it off my bedroom dressor.

Hope you have it stored correctly, don't want gravity to bend your input shaft :lol:

Thu Sep 15, 2011 8:16 am

[quote="vwracerdave"]On my race car with 165 HP I have to replace the 3.88 R&P gear ever 150 passes because they start cracking. The gusseted case holds up fine. Drag race starts is what kills transaxles.

Yeah but the Launch is the fun part! Now doesn't the bus trans move the engine up in the engine bay or is there a way to avoid that? Are guys running the bus trans in stock form? I was thinking about going this route but I don't want to have an issue with my carbs clearing and the deck lid closing. Also don't want to cut out the bottom of my fire wall on my 56. I'm shooting for 200hp on my 2388 but if I get 180 I'll be real happy and I plan on driving it a lot. And yeah I wanna do some hard launches on occasion without leaving a trail of parts. Kinda takes all the fun out of leaving that mustang at the light if ya know what I mean!

Thu Sep 15, 2011 8:26 am

[quote="56bugdan"] vwracerdave wrote: On my race car with 165 HP I have to replace the 3.88 R&P gear ever 150 passes because they start cracking. The gusseted case holds up fine. Drag race starts is what kills transaxles.

Yeah but the Launch is the fun part! Now doesn't the bus trans move the engine up in the engine bay or is there a way to avoid that? Are guys running the bus trans in stock form? I was thinking about going this route but I don't want to have an issue with my carbs clearing and the deck lid closing. Also don't want to cut out the bottom of my fire wall on my 56. I'm shooting for 200hp on my 2388 but if I get 180 I'll be real happy and I plan on driving it a lot. And yeah I wanna do some hard launches on occasion without leaving a trail of parts. Kinda takes all the fun out of leaving that mustang at the light if ya know what I mean! I think softning the launch a minor bit will help on not spiting out the ring gear like lunch.

Thu Sep 15, 2011 8:28 am

66brm wrote: mark tucker wrote: my rino cased super street pluss has lasted 2 years,no problems at all execpt for the wife wants it off my bedroom dressor.

Hope you have it stored correctly, don't want gravity to bend your input shaft :lol: the wife takes care of the input shaft&makes sure it stays straight as she is cleaning it off.

Thu Sep 15, 2011 12:33 pm

HAHA yeah I get it Tucker! Don't get me wrong, I'm not planning on doin 5000 RPM launches at every light. Not one to try to kill my pride and joy but that first couple weeks with a new power plant is hell when it puts an ear to ear grin on your face every time you mash the gas. HEY Paul, didn't I see a bus trans in Garrett's buggy? Is that a stock trans and how's it holding up? I know it a whole different animal but does it actually move the engine up and inch and a half like I've read?