The time has come. New trans time.

[RCCUMMINS89]

I like to use that whenever I can.

I almost peed my pants the first time I heard the "puddle sniffer" reference.

[cmann250]

Well my "puddle sniffer" sets the pan at 12-14" off of the ground right now. Anyone have a measurement on a deep pan? The only measurement I see is "4 quarts over stock". Well no kidding Bozo, it's a deep pan

I'm thinking a little of this action: http://www.summitracing.com/parts/bmm-10280/overview/

Mag-Hytecs are giraffe nuts high and I'm not into lining Clint Cannon's (of Another Truck Sidelined Diesel) pockets with my money.

I haven't decided on a shift kit or an air cooler for behind the grille. I'll call Transgo when I have some time and my thoughts are in order, as they seem to be most popular. I think I wrote down or posted up a cooler P/N that looked good at the time, so I'll have to dig that up.

Oh yea and I had 2 46RHs fall into my lap for good deals. Just goes to show what happens when you sit on your hands

[CumminsPower59]

Caleb, I have that same pan on the 727 I took out of "The Pile", I can take a measurement tomorrow for you if you'd like...

[cmann250]

That would be good. Thanks.

Drop me a PM or a text if you're looking to get rid of it.

[CumminsPower59]

Didn't get over to the old house today, on account of the crazy storms that came through. I do have to get over there tomorrow anyways. Dar already has 1st dibs in the pan, but if he passes, I will let you know

[cmann250]

Didn't get over to the old house today, on account of the crazy storms that came through. I do have to get over there tomorrow anyways. Dar already has 1st dibs in the pan, but if he passes, I will let you know

I remember something about that now. That's fair

[Mark Nixon]

Especially being a puddle sniffer as it is.

Having a "puddle sniffer" isn't too bad.
It's when people go "stinkbug mode" that it gets ridiculous.

I've known people who purposefully put air shocks, shock extensions and HD front springs/torsion bars set as low as they can, JUST to get that "look".

At least they are going downhill all the time. Downhill in more ways than one.

Mark.

[cmann250]

People think 4x4 is a requirement Yes, my next truck will be 4x4, but a 2wd isn't that bad.

I only have 1 drive shaft to maintain, no transfer case to maintain, and I'm never tempted to "try and see if I can make it through there". The answer is "I can't"

I challenge you 4x4 folks to pull 300+ bales of straw on 2 wagons off of wheat stubble, through a mild ditch, and onto the road in 2wd Skill, my friends

[CumminsPower59]

Caleb, the B&M pan that's on the old 727 is 3 7/8" tall, from the bottom of the fins to the top sealing surface...

[cmann250]

Caleb, the B&M pan that's on the old 727 is 3 7/8" tall, from the bottom of the fins to the top sealing surface...

That's not too bad. The stock pan is about 2 3/4".

Thanks for the measurement.

[CumminsPower59]

You're welcome!

[cmann250]

In my quest to make this swap go smoothly, I'm trying to get my speedometer situation lined out before I dive in.

I recall JQmile needing a 31 tooth gear to get his speedometer accurate in Rust Bucket with a 47RH. If my memory serves me correctly, the 46RH and the 47RH have the same O/D ratio. Now I know that my '89's mechanical speedometer needs a long shaft gear. I think my 727's speedometer gear is a 28 tooth model.

So should I order up a 31 tooth long shaft gear?

[Mark Nixon]

Just because so-and-so ran this gear in his truck doesn't mean it is correct for your particular scenario.

As I said in PM, the number of teeth vary according to gear ratio and tire diameter.
There are calculators online to figure this out.

The O/D ratio has NOTHING to do with the speedometer, as the speedo drive is connected to the output shaft, which is independent of the overdrive gearing.

There are 3 standard places to achieve a speedometer reading:

Output shaft on a transmission (either via cable or transducer/VSS).
Some form of magnetic pick-up at the drive shaft (Transducer/VSS).
Gear Carrier tone ring (Transducer/VSS).

Note that the 2 former are related to the output of the mainshaft on the transmission, while the 3rd is the first split from the direct link of the transmission's output shaft.
Either of the 3 is the most constant and least affected by turns.

Put a sensor at the front or rear wheel and speed can vary in turns, especially on the rear axle of a RWD vehicle.

Mark.

[cmann250]

As I said in PM, the number of teeth vary according to gear ratio and tire diameter.
There are calculators online to figure this out.

My brain did not process tire size the when we spoke originally. I have, and plan to keep, 235/85/R16s. They factor out to 31.7x" tall. From what I found with a quick search, old Chrysler speedometers work on 1000 revolutions per mile and the number of drive teeth machined into the old Chrysler outputs is 13.

http://www.wallaceracing.com/speedo-calculator.php
http://www.tciauto.com/tc/speedometer-gear-calculator/

Both of these calculators say I need a 25 tooth gear.

Now I realize the output shaft is directly connected to the drive shaft which is directly connected to the back axle.....tires....ground. The output shaft spins faster and faster as speed goes up, regardless of O/D. My head was wrapped up in a 2 speed rear axle world this whole time.

[cmann250]

http://www.summitracing.com/parts/DER-13614/

That's the cooler I've decided on.

I've had a revelation. I want to use the power I have. Safely This is my new direction. 90% of the time, my transmission has an easy life. I generally have my valet closed and don't demand high horsepower on a regular basis.

Now to account for that other 10% of the time... So at 300 hp, +/- 30hp, what could I feasibly tear up, on the odd event that my truck hooked up strip. I still maintain that my power level will not change much in the foreseeable future which is 3-5 years. I know the truck's weight will not change either.

I'm not at 500hp and I'm not at 7000lbs....

Does this "building it for the 10% of the time" change anything?

Can you tell I'm on an "over-build it" streak?