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1970 Pontiac Firebird need new Positraction & Gears

May 19, 2014 - Author: BartBarton

I have a 1970 Pontiac Firebird with the 455 engine and automatic transmission.

Question:  The firebird needs positraction and a new change in gears from 2-56 to ? The firebird has the TH400 transmission, 8.2 10 bolt Pontiac rear end. need something with more pulling power and still comfortable to drive down the hi way. 3,08 or 3.36 ? had a TH350 in car but 455 with  60 over mild camshaft, ate them ! Went with 400 now lost some pull in 1st and 2nd gear. what to do and how much?

Answer:  You can figure you RPM at whatever MPH you want to drive with this formula RPM = MPH X Gear Ratio X 336 then divide this by the tire diameter in inches.


Replacement for GM Stock Posi

Here are some options we recommend see if any of these will work for you:

  • Eaton positraction you will need is part number PFEA19674-010 $526.27
  • Motive 3.55 Gears PFMWBP882355 your cost is $262.85 there is also a Yukon 3.36 Gears available part number PFYG GMBOP-336 your cost for this gear kit is $294-55
  • You will also need a bearing rebuilt order our part number PFR-10-82 your cost is $ 116.41 plus S&H. These are all high quality aftermarket parts.

If you have additional questions, to place order or need help give Lance a call at 800-444-0755 he can help you. Installation is available in our shop in Maple Grove MN, just give us a call to schedule.


No Comments - Categories: Positractions, Rear End Ring & Pinion

Ford Explorer 1996 4.0L 4WD BW4405 Vibration Problem

May 13, 2014 - Author: BartBarton

I have Ford Explorer 1996 4.0L 4WD.

Question:  Trying to resolve a bw4405drive train vibration issue. Only occurs when front drive shaft is installed, and starts at about 50 mph. Bad vibration you can feel through the floor – can’t really go faster than 60 or vibration is too much. Pull the front drive shaft and it goes away. Have tried two replacement front driveshafts, one reman, the other new. There is no play that I can feel at either the transfer case output or the front end input. Trying to figure out if I have a front end, transfer case, driveshaft or cv shaft issue. Both cv shafts have been replaced. Driver’s is less than one year old. Passenger about five years old. Older truck that I need to keep driving for a while yet and really want to get this figured out. And don’t want to throw buckets of money at it but would like to get 4WD operational again. Driving with shaft out now. Any thoughts?

Answer:  You have the BW4405 transfer case. First thing we would suggest you check would be the tire diameter. It is very important that the tires all match in diameter.

The transfer case has a variable clutch pack in it and if the system is showing slippage (different tire diameter) it will be trying to engage and disengage the 4wd system and cause this issue.

Also this transfer case is known for rear case wear in the rear output bearing area. With the rear drive shaft off pull straight in and out on the rear yoke, you will notice play in and out and there shouldn’t be any. If this play is excessive you will want to address this also.

You  can visit our shop at 11071 93rd Avenue N Suite A Maple Grove, MN 55369 and we can help you diagnose the problem.  See the other parts we can provide on our web site


No Comments - Categories: Transfer Case, Uncategorized

See You At Back to the Fifties Weekend

May 12, 2014 - Author: James N


back to 50

Can you believe 47 year of back to the fifties

We are Equipped to work on your fifties Classic ride. We can build you a new drive shaft or fix your old drive shaft.

Need a Clutch for your Classic Car

Find are Ad in the Linechaser or your program at the show                                                                                                                                                                                                                                  We offer discounts to MSRA members

Call James 1-800-444-0755

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No Comments - Categories: Around the Shop, Automatic Transmissions, Clutches, Drivelines, Manual Transmission, Positractions, Rear End Ring & Pinion, Uncategorized


May 8, 2014 - Author: James N

Question Why can we not replace ujoint in are 2007 Dodge Sprinter 170WB


They are Crimped in and are not available so the dealer will want to sell you new shaft. But please call us first so we can save you Money. We will need your year make and model along with your wheel base and Vehicle identification number. Then we will build custom driveshaft for you. This would be new shaft with Spicer Dana Ujoint and hanger bearings to fit your 170WB sprinter van with all replaceable ujoints and Balanced. Price $973.00  

Call use for all dodge sprinter driveshafts 118, 140, 144, 158 and 170 wheel base vans

Questions ask for James 1-800-444-0755



No Comments - Categories: Drivelines