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70 Dart 340 rebuilt, compression coming in right at 9.8:1. With the lunati 703 cam. Tire height is 25.7" (245/45/17) Currently have 4.10 gears with Hemi OD 4 speed gears. Ratios are: 1st: 2.66 2nd: 1.59 3rd: 1:0 4th: .80 I'd like to have more drivability on the hwy. Was thinking about 3.23...

I have a cone type sure grip in a 489 case with 4.10 gears. I had @RustyRatRod rebuild/resurface the cones and had a local shop set up the new 4.10 gears. All the parts (gears, seals, bearings, etc) I got from Dr. Diff. Also used a crush sleeve eliminator. I put 80-90 Sae fluid in it with a...

Guy is selling 8.75 out of a 74 truck. I would like to get another center section to build, worth picking up? He's asking $150.

I have a 489 case sure grip and am upgrading to a 1350 yoke. I have the crush eliminator. Can I just zip off the pinion nut and put in the new yoke, and then torque the pinion nut? Also what is the torque spec?

Is there a way to test the OD and LU solenoid on a 42RH. I swapped one into my 70 Dart and it was working fine, but then just quit. I don't want to put a new solenoid.in if there is a wiring issue. Thanks,

I just finished my 70 Dart with a 340 and 42RH conversion. I took it out for a test drive, however the vibration is so bad, I had to take it home. I can feel it idling in drive or reverse and continues right off idle. I brought it up to 35 mph and the vibration/noise increased with speed. I...

With my Classic Auto Air, headers and my spark plug wire holders, I am having a hard time getting my trans dipstick out without burning my hands. I saw these on ebay, but wasn't sure if they were accurate. The lokar ones are over $100,which seems ridiculous. Chrysler 904 Flexible...

No matter what I do I cannot get enough of an adjustment at the bracket to get the threaded pin on to shift lever. I can get it close, but there's literally like one turn on the pin, and the adjustment nuts are all the way back. Yes I'm using the lever that was supplied with the shifter. What...

Do I use the A500 arm? The pin is pressed. I have no problem drilling it out and putting the lokar pin in. I also have a 904 arm, which is longer. @TrailBeast

I swapped in my a500 into my dart, which originally had a 904. However the slip yoke from the 904 does not fit the A500. I thought they interchanged? What's slip yoke should I be looking for?

I am going to fire my car this week, but don't have my driveshaft, yet. I want to be sure the trans is in Park (so I can find neutral). Is it all the way forward (towards front of car) or all the way back?

Are the dipsticks the same between and A500 and the A518?

I'm looking for the overdrive lock up solenoid connector. I've looked online I cannot find it anywhere. Does anybody have any idea where to get one? I tried the dealer, but without a Vin, they were pretty useless.

I am gathering parts to swap the 42rh into my 70 Dart, however I am not sure on the speedo cable. I have read 80". I have an aftermarket speedometer which has the 5/8-18 threaded end, which I can find, but not sure on the trans side, size. Is 7/8 the right size for trans side?

I have a 8.75 rear with SBP and am upgrading to BBP axles from Dr. diff. My question is, will I lose a lot of axle fluid, swapping the axles?

Napa has two listings for a 42RH lockup converter. One says 904 based and the other says A500 based. The only reason I question it is the price of them, one is like $15 cheaper. Can they be interchanged? Here are the part no: PMT CR9H (904) PMT CR67 (A500)

I found an 8 3/4 that has the following measurements: Perch to perch (center) 43" 30.5" axles Axle housing (no backing plates or brakes) Just under 59" I looked up the 8.75 chart on moparts and it appears to be c body length with a body perches? The welds look factory to me. A friend of mine...

I have a 8.75 cone sure grip with a 489 case. I am going with 4.10s with seals and bearings from Dr. Diff. Two questions: 1. Can I un bolt the sure grip and have the gears seals and bearings replaced with the sure grip out? 2. Are there any members on here that rebuild the cone style? I...

Hi everyone. I have a 70 dart with a 340 and a A500 (42rh) OD trans. I have been playing with the rpm calculator and with my 25" tires and a final drive of .69 at 65 mph, rpm sit at 2400. I know I will eventually step up to a 27" tire,which drops the rpm to 2200. My question is that too low...

I had planned on doing a 2004r swap but after realizing no pick n pull had a core, I decided to go with the 42rh (A500). Now what I am finding is these places think they are made of gold. One yard quoted me $750 for a trans that has over 200k miles, another quoted me $350 for the same mileage...

I saw this on the US Car Tool site, when looking at the 2004r mount. 67-75 A-Body 518 Crossmember Kit I was originally going to do the 2004r swap, but I cannot locate a core and the rebuilt ones are expensive ($1700+) I don't need an all out race version, I just have a mild 340 and want the...

I got a replacement speedo cable from oreilly 's however the trans end on the cable I got was not large enough to screw onto the tailshaft housing. I know these are year specific, does anyone know what years had the "larger" end for the trans? I have a 70 dart, 340/904 but used to be /6...

I finished my 340 build, now I need to go through the trans. My question is will I need a stall converter. Here are my specs: 70 dart 68 340 .040 over Keith black hypers 9.5 compression Big valve j heads Rpm air gap Comp cam: .454 lift duration @.050 218 lobe:110 245/60/14 in...

I have a 70 swinger 340/904 with the lokar throttle cable. Can I use a factory kickdown linkage with it? Thanks!

I replaced the filter And pan gasket on the 904 and put 5 QTS in it and started it in neutral and let it warm up. I continued to add fluid until it showed full on dipstick. I moved it out of the garage (about 20ft) and back again. I went out there a few days later and there was trans fluid...

How does the passenger side cooler line route? I can see where it mates to the trans, (904) but am unsure if it goes behind the header(next to block) or next fender? Above or below torsion bar? Thanks!