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To eliminate vibration, it is important match the total amount of U-joint angles of the front u-joint and / rear u-joint example.... 1) differential angled DOWN 3.5 degrees MINUS (same angle) driveshaft DOWN 1.0 .................equals total 2.5 degrees 2) engine angled DOWN 1.5 degrees...

cable is new and was lubed when installed. I have come to the conclusion after every ones valuable input, reading another thread and several speedometer charts / gear calculators....the 38 tooth is correct but the speedometer is likely in need of a rebuild and is off. I will check and see if...

pretty sure. but will re-check. however, I'm not sure that would make any difference other than tearing the plastic gear up. But I have been wrong before, just ask my wife.

speedo is off about 5mph........... @35 it reads 40, @ 55mph it reads 61. currently I have a 38 tooth pinion which is what Brewers chart shows for a 27" tall tire (275 / 60 / 15) with a 3:91. I verified it has 3.91's and installed the (blue) 38 tooth speedo pinion myself. I'm thinking a 39 or...

2 big issues to consider..... GV price....they have really gotten up there, I think exceeding $2500 modification....to maintain the factory engine / transmission angle, modification /enlarging the tunnel aft of the transmission cross -member is required if it were me.... I would go with the...

I have one behind the Hemi / Passon aluminum case A833 in the silver Duster....To keep the engine angle close to factory, I cut a 12" section out of the pinched part of the tunnel aft of the 4-speed hump and replaced it with a section of tunnel from Chris Alston. Shorten driveshaft a given I...

Looking thru Summit Racing.....I ran across Mopar Performance Super Stock Springs for $265 a set....delivered to your door. For those who are gonna street drive it (not you) , simply buy the same spring with same arch for both sides (@$132ea)....the car will sit level. In stock....readily...

That is a great option too......especially for hyway use.

just a fuzz shy of 30" tall

Just for discussion....the GV reduction is .78.....takes my 4:30s down to 3.35. How much lower do you need in a hot rod? I bought my second one second hand / but still in the box....delivered to my door for $1500. There are used ones out there if you want to save some bucks.

I have a GV on my aluminum case 4-speed....and one in the box for the 727 that is going in my next project. It will split shift like the dump truck I drove in my twenties, but I like it for anytime over 55mph.....especially on the 4-lane doing 65-70 @ 2200-2400 rpm.

a stick car with big HP and a big sticky tire....perhaps a street car (under 500 HP) w/ an automatic.....no need what so ever

I have one in my Duster 30" tall rear tire...4:30 rear...75mph @ 2400 rpm, the sweet spot! I see used ones less than $1500 from time to time I would buy one again. I slightly modified the tunnel to get it to fit as high as I wanted to keep the pinion angle on my rear end realistic. FYI....it...

currently working on a 1970 Duster and switching from a 6cyl/3-speed to a 383/4speed. there is key removal lockout linkage hooked to the reverse spragg on the transmission and to the steering column (like automatic column linkage). It allows for key removal/turning on only when the shifter is in...

what angle would you recommend?....this is pretty much a stock build moparmat2000....that is interesting info

not my thread....but thanks for the help guys

thanks swap meet special... the old perches now are not in the stock location...moved in 1/2" per side which is what we want...but the angles differed. I wanted to doublecheck against stock specs one was 2*...the other 4* up

good job on the chart....just missing the pinion angle for the spring pad install and I'll be all set

good point....kinda takes the fun out of it.

I have a gear vendor in my ol' silver Duster....I like it. It probably can be done without major modification.....but the motor/trans angle is gonna be steep. I opted to modify the floor pan/tunnel just behind the transmission crossbrace/mount.....very simple and the carpet hides the...

really???