My 92 RMS needs a kick in the pants and a bit of help pulling the pontoon boat (at least thats my excuse to my wife for a taller gear) and I was thinking about a 3.73 Im an old school guy with old school knowledge so hope someone can help. If I toss in a 3.73 am I looking for computer or whatever else troubles? thanks
Yes I think you will need to have your PCM retuned. Those gears should be good, and a tranny cooler as well.
Just put a Torsen and 3.73's in my '93 caprice. These cars use the oldskool speedo gears. You will need to change them to match the gear (they're cheap and easy) I like the gear a lot, you really don't even notice the difference just cruising around town, but it's day and night when you jump on it. :2_thumbs_up_-_anima
RMW & 3:73 gear Sorry but whats a Torsen? As far as the PCM being retuned, no big deal?? Im getting wood thinking about my woody and a 3:73
torsen is a posi trac. (both tires push the car) But,rms shuld have one. If not, Find a RMW and take that one. And, try 3.56s. You wont like the car for daily driving with 3.73s.
Your RMS might have an Auburn Posi and 3.08 gears, It might not, check the tag. A Torsen is a gear to gear type differential. The typical "Posi" unit used in cars use springs and clutches to send power to both wheels. "Torsen" is short for "Torque Sensing" GM has been using Torsen diffs in the Hummers, it's a tough unit with no clutches to wear out. Now... as far as hating the 3.73's Well.... I have to say You will not ruin the drivabilty of the car The change from 2.92 to 3.73 is barely noticable when you are just putting around town, I was really suprised by this I really expected a more dramatic change in the car. The car comes out of 1st almost immediately but you hit the OD about 40 anyway and then the car just feels normal. However.. When you stomp on it, it is a completely different animal First impressions: I expected a smoke show at full throttle from a full stop... No joy. The car hooks and and pulls harder but no spin however, my motor is way tired, maybe the Torsen is just better at power distribution? I don't know, I've only had clutch posi's before. I'm about 90% finished with a new motor, just need some tin and another Caprice intake and I should be pretty close to 300hp. That ought to get the tires spinning It picks up MUCH quicker at full throttle. Most of the Caprice/Roadmaster guys I have heard from report no more than a 3 MPG change in fuel economy My speedo is of course WAAAY off, I'll need to pick up the correct gear/driven gear. Overall, I see now that I will need a converter and more power to make the most of the My advice, go for the 3.73's and a good posi unit (Eaton, Zextel Torsen, ect.) and run a 2400 to 2800 stall converter. You will dig it.
I would love to jump up to 3:73s myself, but Im already having a hard time keeping tires under the rear of my 92 Roadie. Wet streets and a heavy foot leads to alot of quick on the wheel countersteer action required. Dry pavement will leave me 20ft or better posi's off the line and she is bone stock with 162k on her.
Posi, Horse Power, Hole Shot I LOVE IT You guys are great. Im moving foward and keep you posted. I have a 67 Camaro which I have had for 33 years and a bit of a toy with a 327 & 11:1 comp, big cam and being pushed by a 4:46 gear BUT my Woody might just be the car to cruise in this summer.
I'm jealous! My '93 is getting pretty tired It wouldn't even bark 'em in dry pavement, wet pavement would give me a little thrill.
I agree with all but advice to use the high stall speed torque converter. The shorter gear will give him the grunt he's looking for to pull the boat from a stop or up a boat ramp. The stock motor is already well in it's torque curve at whatever the factory stall is. A loosey goosey converter on a mildly cammed engine is just a big sloppy fuel waster. The gear alone will accomplish his goal.
I agree that too much stall for the engine would put it past the torque peak. But, the car has a 4l60/700R4 trans, so the converter will be locked by 45 MPH anyway so slippage shouldn't be a problem. The trick will be to either go to an S10 converter or work with somebody like edgeracingconverters.com to build one with the proper stall for the motor
