mcar00

Anyone drop in a ZR1 close ratio transmission in a C6 Z06 who regularly tracks their car? Just wondering if the cost would be justified in a "seconds per lap/$" benefit. Assuming the durabilty of the stock Z06 trans. is sufficient are you better off changing the stock ratios (if that's possible) or purchasing a ZR1 trans.? What would be the cost of a ZR1 trans.?

wallyman424

you'd be better off buying one of the 2 GM motorsports boxes LG has laying around. Theyre offering them for pretty darn cheap if you ask me.

spazegun2213

Rockland standard gear has a 6sp version of those race boxes if you want something nice for the road.

RAFTRACER

The boxes that LG has no worky in a C6....

As far as the ZR1 trans into C6Z goes, seems like a good idea to me although this will not be cheap proposition and it actually would be better suited with a little more rear ratio....

You can buy this gearbox over your friendly GM parts counter for somewhere around ~4.5k..............

Mikelly

Ask Lou what he put in Jim Mcnemar's 08 Z06. He does NOT have a 6 speed in his car... I thought they sold him one of their boxes and it works just fine in his car.

Mike

RAFTRACER

The GM Motorpsorts boxes that LG has are for C5's...

ZR1 gearing is the same however.....

Pumba

I sent an e-mail to Gene Culley yesterday and he quoted me approximately $3,750 for a new ZR1 transmission.

RAFTRACER

Definately depends on the dealer.....some are more friendly than others.

Dont forget about shipping and handling on an expensive heavy component if it is not local..

floor it

I would not do anything until I talked to the guys at RPM, they may be able to just redo your 6th gear,,,,,

Pumba

First, the 6060 trans is a much stronger and smoother shifting trans than the 5060.


Second, RPM gets some of their customer gears from Liberty Gear here in Michigan. I had Libery change the 6th gear changed in my MN6. EXPENSIVE!


Third, the entire gearset in the ZR1 6060 is a close ratio set. Changing 6th gear alone would be useless. Changing all of your 5060 gears would be more expensive than purchasing a new ZR1 trans.

0Anthony @ LGMotorsports

Sure they do, you just have to tell me that before you buy them. All it is is a simple rear tailhousing change to mount to the C6 style diff. Already done it a couple times.

0Anthony @ LGMotorsports

JMac's car had a changed out T56 that we changed a couple ratio's on, but it was not the close ratio box. Don't remember if we pulled 6th gear out of it or not. Might have though.




Off-topic, how ya been Mike?

0Anthony @ LGMotorsports

As far as the ZR1 unit goes....we are dropping one in along with the ZR1 diff in a twin turbo Z06 here at the shop. It can be done, just depends on what you are looking for, strength and gearing or just gearing. If you are just wanting the gearing changes there are less expensive ways of doing it then going with the entire ZR1 unit.

Remember also if you do the diff you have to have a 2009 or newer rear cradle to mount it to.

0Vector Vette

I believe the drive shaft on the ZR1 trans is a larger diameter, so you have to change diff as well.
Robert

mcar00

What would be the less expensive ways to get close ratio gearing for road course use? Thanks.

Mikelly

Doing good Anthony. Hope all is well with you guys!

Mike

0Anthony @ LGMotorsports

Couple different options.

1. Buy a stock GM ZR1 tranny. These should bolt directly to a OE Z06 diff unit. If you are doing both the diff and the tranny you will need a 2009-current rear cradle just to mount the diff.

2. You can do a fully built RPM ZR1 tranny for a few dollars more with all of the standard upgraded parts

3. You can take one of our GM race boxes and use a C6 tail housing, with a little modifications use with a C6Z diff as well.

Anthony

wallyman424

i don't see why you'd do anything besides the race box.

DOOOO EEEETTTT

0Anthony @ LGMotorsports

Better hurry because I have one check on the way and a name on the second and last box.

wallyman424

I'd do it, but I'm dropping a bunch of dough on a diesel truck and a sweet trailer.