Rancho Pro-Street gearbox

[181]

Does anybody know what exactly is inside? What 1st gear is used? Thanks, Jan

[The Ideaman]

Did you email or call Scott Sebastian.  I bet he can build you a trans for less.  Let  me know.

Luke
(559)299-4613

[richie]

Usually the 3.80 stock 1st gear,it is NOT strong enough for what you want to do

cheers richie,uk

[181]

i was hoping that 3.78 1st will hold up some street driving?

[richie]

i was hoping that 3.78 1st will hold up some street driving?

The later 3,78 1st is much stronger[late single side cover IRS and gt boxes had them I believe],I wnet 11.50s with my old nitrous combo using a late VW 3.78 1st ,not after market so yes that would be better,but the early 3.80 1st is weak

cheers richie,uk

[181]

so I take it that ProStreet box use weak early 3.80 first gear?

[Torben Alstrup]

I think the pro street boxes are reasonably safe up to about 150 hp on slicks. Above that DEFINITELY go with the later 3,78. Above 200 hp., go with Erco or Weddle main shaft.
A couple of the guys over here has "tested" the strength of the later stock mainshaft, while waiting on funds and time to build the right one. It held a 210 hp 250 Nm engine for a short season, breaking 1st in the very last race of the year if memory serves.

15 years ago I was involved in drag first hand. then we had a 1910 Type 4, producing roughly 160 hp. in a 640 kg car. The old 1st gears held a couple of weekends, maybe three. We then swopped to the late mainshaft, got another 18 hp and was safe. Then we began to mess with a 60 shot of Nos, and then it was all over. Even the late main couldnt hold it anymore. So after that we only used the shot in second through 4rth.
T

[Bruce]

so I take it that ProStreet box use weak early 3.80 first gear?

If the gearbox is advertised as a "Pro-Street", it has the weak first gear.  If it is a "Pro-Street Plus", it has the strong 9 tooth first gear.

[67worshipper]

here in the uk you can specify a 3.78 1st gear for a price of 150.00 pounds on top of the pro street price.

[jamiep_jamiep]

My pro street box has been in my old stock weight 54 for about 4 years, and has run down to mid 12's and was as slick when I removed it as it ever was.

Although I took it out because I figured it was a matter of 'when' not 'if' I killed it.

[Pas]

My pro street box has been in my old stock weight 54 for about 4 years, and has run down to mid 12's and was as slick when I removed it as it ever was.

Although I took it out because I figured it was a matter of 'when' not 'if' I killed it.

Did you use this box with slicks Jamie

[jamiep_jamiep]

No, I've only ever run radials Pas. The rear end consisted of AVO shockers w/120lb springs, stock torsion bars, 1" raised solid mounted s/a box, SAW axles and home made flop stops.

[mcmscott]

I get a kick of how a name makes a gearbox stronger,, Pro-Street, or Pro Street Plus, or SuperSand or whatever people call thier boxes,,, I call all of my trans Bob, because the name don't mean squat   

[ranchoparts]

Hi

The Pro Street Trans is good for 150 HP daily Street Driving. No Racing, No Burn-Outs, No Agressive Driving and No Slicks. I know some people do but there days are # and soon will be pushing there Car home.
Pro Street Plus this is a better Trans to have fun with you get a stronger 3.78 1st, Chromoly Pinion Retainer,SAW Axles or (IRS) Super Splines and a Klink R/P. These are the basic up-grades that you would need
for more agressive driving. If you want to use Slicks I would suggest a Gusset on the Trans Case. Remember anybody can break any Trans all they have to do is want to or have a poorly set up Car that's
what breaks most Transaxles.

Thanks
Mike           

[mcmscott]

are you saying that a "pro-street plus" irs box has to have type 2 or 930 cv flanges? because Ive never heard of any one running a 091 spline to a t-1 cv!,,,,,, Once again a name is just that

[ranchoparts]

It takes Type 2 091 Bus Flanges. Its just a name to give it some Identity everyone use's them. Here are some that mean the same thing Pro Street, Super Street, Street Pro Etc.
What is the problem with putting a label on something. When someone ask what kind of Trans do you have you can say go to this website and check this one out it's what I have.

    

[mcmscott]

There is absolutely nothing wrong with labeling something, the problem is with so many trans builders what one builder calls something is completely different than the other builder, If someone asked what is in a pro-street engine you would get ten different responses from ten different engine builders.

[RFbuilt]

yeah.. but i think.. its fine right?

much like cylinderheads,   every time sum1 mentiones stages or levels.. the porter's brand/name is second to it.. without it..  a stage 2 could either be  from Tims  or sum1 else?

i think the worry is more on the costumer/buyers end.. people tend to categorize everything like its from 1 shop

we could safely call it Rancho pro street,  for sure it wont be kcr pro street hehe

[mcmscott]

Exactly

[RFbuilt]

curiouis who ever used the term pro street , first,

then the rest wer juz lazy and used the same name.. for sumthing similar or different..

kiunda like  " oh yeah we have that pro street also "     creative LOL!!!

[Bryan67]

I`m pretty sure that all type 1`s after I think 1971 used a 3.78 1st gear. So would that mean that if I buy a "Pro Street" and not "Pro Street Plus" trans from someone like Rancho for say, a 72 that I would NOT get a 3.78 1st gear?

[mcmscott]

How can I stir the pot if you beat me to it?

[Bruce]

I`m pretty sure that all type 1`s after I think 1971 used a 3.78 1st gear. So would that mean that if I buy a "Pro Street" and not "Pro Street Plus" trans from someone like Rancho for say, a 72 that I would NOT get a 3.78 1st gear?

The 9 tooth 3.78 first gear apeared in late 72 for the 73 model year, only in German made gearboxes.  It doesn't matter what year you tell them your car is, if you buy a "Pro-Street" gearbox, you get the early 10 tooth first.  The "-Plus" gets you the 9 tooth mainshaft

[mcmscott]

So if the core you provide them with has a 002 mainshaft(splined,superbeetle,3.78, 9-tooth) or whatever else one wants to describe it as, they remove it as you did not order a "plus" gearbox?

[ranchoparts]

How can I stir the pot if you beat me to it?

If that is what you are trying to do. You are not very good at it

[Bruce]

So if the core you provide them with has a 002 mainshaft(splined,superbeetle,3.78, 9-tooth) or whatever else one wants to describe it as, they remove it as you did not order a "plus" gearbox?

Yes, that's the way it works.  If you think that's totally unfair, I assure you, the opposite is usually true.  Let's say you're building up a 62 Beetle, and you want it built for speed.  You take out the WORTHLESS 62 gearbox as a core, but you want it replaced with a 72 gearbox (and all it's upgrades).
However, you can request that your core be rebuilt into your new gearbox.

[mcmscott]

And then you get charged for a core

[Bryan67]

Heres another favorite. What exactly is in a "Freeway Flyer"?

[Andy]

Hi

The Pro Street Trans is good for 150 HP daily Street Driving. No Racing, No Burn-Outs, No Agressive Driving and No Slicks. I know some people do but there days are # and soon will be pushing there Car home.
Pro Street Plus this is a better Trans to have fun with you get a stronger 3.78 1st, Chromoly Pinion Retainer,SAW Axles or (IRS) Super Splines and a Klink R/P. These are the basic up-grades that you would need
for more agressive driving. If you want to use Slicks I would suggest a Gusset on the Trans Case. Remember anybody can break any Trans all they have to do is want to or have a poorly set up Car that's
what breaks most Transaxles.

Thanks
Mike           

Mike, just to spell it out to me, as I have a 'Pro Street Plus' waiting to be installed. Will it stand up to Burn-outs and how about drag strip use, this is in a full weight street bug that has less than 150hp.

Thanks.

[Bruce]

And then you get charged for a core

And why not?  If you send in a useless 61-63 core, they then have to go out and BUY a suitable core to build into your new gearbox.

When I build a gearbox for someone local, I find out exactly what they need, then make them go out and find a core that provides what they need. If it's a full out swing axle with a late case, they have to provide TWO cores.  Last year, one guy provided THREE cores to get what he wanted!