4.37 Gear Installed

[Johnny Rocket]

Installed the 4.37 gear the from member ripped me on....Used my orginal case and bought new bearings etc.

Lots of work but I was able to use my orginal case. If I had the knowledge before hand I would have just bought a new gear set.

I think all of these gears are the same. I have had 30 years of experiance of setting up ring and pinions so thats why I went forward with opening both cases and measuring everything to see if it would work ..it did

Thank goodness the Ring and pinions were the same.bearings etc

Stuck the 4.37 over in my case and drove it away.

No 60 ft times yet as the car really needs a convertor. In our cold weather the stock convertor stalls around 1600 to 1700 RPM

Probably about 1500 in the summer.

Even so it turned my cheap tires into smoke....

A convertor & some F 1 Goodyears and we will be set for some good testing

The 4.37 gear suprised me......the engine loves it....the part throttle acceleration is amazing.......taking off from a stop sign it gets right out of first and into second......much faster than the stock gear

The TCU acted like it always had that gear in the car.

I had it on the highway tonight and it was still quiet. Second gear shifts are making some tire noise during the shift....

Cant wait for the convertor and tires.......

These cars love a gear.... the engines are small and high reving and thats what a heavy car is begging for. It needs that torque multiplication to move its fat a** away from a stop sign with some step in its walk!

[maxnix]

Look forward to hearing more.

Get some tires with UTQG rating around 220 or lower. F1 "All Season" are about 400.

What are the RPM at GPS verified 80 mph?

[Johnny Rocket]

I will put my GPS in the car tommorow to find out...speedo is way off.......have a gear comming from infiniti that will probably get me real close.

But man 0 man is it snappy !

I was going to get the extreme f1 goodyears...lots and lots of wet and dry traction.......about as good as your going to get....dont know about those numbers...but will check

[Johnny Rocket]

Look forward to hearing more.

Get some tires with UTQG rating around 220 or lower. F1 "All Season" are about 400.

What are the RPM at GPS verified 80 mph?

How about a verified speed at 7000rpm in fourth?

I dont drive 80 Mph...you will get a ticket in Illinois for anything past 69 MPH

Thats were the RPM matters..........but not that much...

[Trumpkin]

I'm glad it all worked out. Most people say it doesn't make that much of a difference, but I could really feel it. I also did my 408 first, then the tc and performance transmission later. It shifts much harder and tighter like james suggests. I too ordered the speedo gear. It's not perfect but close. Keep us posted.

[paranoidjack]

Has anyone here done a 4.08 (or anything snappier) swap on the y33?

[MinisterofDOOM]

I dont drive 80 Mph...you will get a ticket in Illinois for anything past 69 MPH

Remind me never to move to Illinois. You'll get run off the road for doing less than 75 here in Utah.

[elwesso]

you can bolt in a 4.08 from an N/A 300ZX into a Y33.. not quite as much difference as G50 (3.54 vs 3.69 in Y33).

ive said in the past that its usually not worth the EFFORT... but if this is an easy-ish solution (especially for someone who's had experience setting gears up) then so be it..

[maxnix]

ive said in the past that its usually not worth the EFFORT... but if this is an easy-ish solution (especially for someone who's had experience setting gears up) then so be it..

Even a skilled person with the right tools will have to do several iterations to get it just right. It takes a lot of experience to be able to do it just once and get it right on the first time.

[Johnny Rocket]

RPMs........2800 is 70MPH GPS..Stock tire size.

Car really scoots in the gear change....especially from a dead stop....first gear starts are real interesting

[Denver90Q]

I have a spare diff from a low mileage wreck that looks like it has been worked over but I have no idea what kind of gears are in it. I guess the best way to find out would be to install it? How long does it take to remove and replace rear diff without a lift?

[Johnny Rocket]

Actually is not a difficult job.....on a lift it took less than an hour.......on jackstands etc I imagine you could add 30 minutes or so

I think all the Nissan's use the same ring and pinion......they do vary the cases but not the pinion specs etc

I had gears out of a skylane and a center section and I took both gears out of the cases and they were the same.....I was suprised...JAPS dont spend any more money than they need too.......Unlike the big 3 where nothing interchanges

[Denver90Q]

Hour and a half-not too bad. Takes me over an hour to change my oil.Let us know when you get the convertor installed (probably not a DIY installation?] My 1990 already feels a lot snappier than my 1995 and these upgrades would really make it feel like a old muscle car. I'm hoping that I have at least a 4.08 or until the price of gas goes up again or I blow my transmission. Someone even went to the trouble of painting the diff case silver?

[Johnny Rocket]

On a lift and I rented a trans jack it took about an hour & 1/2 to pull the trans back....I would not attempt to think about this without your own lift and trans jack..

So a convertor is no big deal either........just make sure you get the convertor into the front pump

[Trumpkin]

Mine is off a z with cooling fins. I did it silver but the car is so low you can't see it!

[Denver90Q]

I do have trans jack but no lift. I could get access to a service pit. Got to make sure I have the 4.08 + first.

[Johnny Rocket]

you cant do it on the ground thats for sure!

[maxnix]

Got to make sure I have the 4.08 + first.

Turn the input shaft one revolution and count the revolutions of an out put shaft.