Products to Compare (max of 3)
X
Compare These Parts
America's Oldest Speed Shop ® Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Help Center
Help Center

U.S.Order Line:

800.979.0122

(CST) 7am - 10pm

Race and Rod Tech Support

Mon-Fri 8am - 5pm

Canadian Order Line:

855.313.9180

International Order Line:

1.402.323.3200
Since 1952
Menu
Shop By
Support
Account

Ford 9 Inch Third Member Assembly, Full Spool, 31-Spline

Specs
Gear Material:
Steel
Spline Count:
-
Sold in Quantity:
-
Ring Gear Weight:
-
Differential Type:
-
Spool Weight:
-
Gear Ratio:
-
Weight:
31.8
Tooth Count:
31
Ford 9 Inch Third Member Assembly, Full Spool, 31-Spline

Click image to enlarge

Details

Reviews (8)

Q & A (7)

What's in the Box

Info

  • Professionally assembled for oval track racing only
  • Includes Pro Gears ring & pinion
  • Your choice of gear ratio, 3.50:1 to 7.33:1
  • Includes stock Ford yoke
  • Viton high heat pinion seal
  • Solid pinion bearing spacer with shims
  • Plastic storage case
  • Weighs 31.80 lbs

910-48343 Instructions (PDF)

Third members are made to order. Please allow 24-48 hours for order to ship.

Order applicable spool:

  • STD = Standard
  • LITE = Lightweight
  • MEGA = Megalite

Available options include machining of the yoke to accept Chevy/GM U-joint (add 91048339) and lightening of the ring gear to remove weight (add 91600013; 5.37:1, 6.66:1, 6.83:1, 7.00:1 ratios are already lightened).

Notes

WARNING: Circle track racing applications require a minimum of 4 qts. of rearend lube. Using less than this amount will lead to immediate pinion failure.

Warranties

No warranty is offered or made for durability or specific performance.  No warranty is offered for commercial, off road, street performance, or racing use.

Customer Reviews

Rated 3 out of 5 by 8 reviewers.
RATING BREAKDOWN
8 reviews
5 Stars
4
4 Stars
0
3 Stars
0
2 Stars
0
1 Star
4
RECOMMEND THIS PRODUCT:

shannon
Verified Reviewer
louisiana

Ford 9 Inch Third Member Assembly

November 15, 2016
Installed two days before the Texas Grand, and did the break in on jack stands. It worked fine and had no issues....
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

JEFF
Verified Purchaser
UTAH

FORD 9 INCH THIRD MEMBER ASSEMBLY

July 14, 2016
NICE UNIT WAS ALOT NICER HOUSING THEN I EXPECTED AND WORKED PERFECT
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Miller
Verified Purchaser
MT

Junkyard special

May 07, 2016
Price seemed ok but quality was not there to match. The housing looked like it had been under water for 20 years it was very pitted. Installed and after adding fluid the pinion seal started leaking. Removed yoke and the seal surface on it was grooved and pitted out causing the leak. Bought a new yoke, installed, and seal must have been damage by old yoke cause it leaked with brand new yoke also. Now changing seal to!
No, I would not recommend this product.
Full Size Image

Was this review helpful? 0 0

Merchant Response:

Miller- thanks for your feedback. We're really sorry to hear about the trouble you had with this third member. Please give our Customer Service Team a call at 800.979.0122 for further assistance.
Jason
Verified Purchaser
Georgia

Perfect with a good price

April 19, 2016
I always order from speedway for nice quality parts with a knowledgeable staff easy ordering and quick shipping
Cons:
  • Quality Product
  • No Hassle Ordering
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Josh Helmick
Verified Purchaser
Verified Reviewer
Fredericksburg va

Junk

March 04, 2016
Don't by beware broke backing off trailer after installing customer service would not do any thing
Cons:
  • Broke Backing Off Trailer
No, I would not recommend this product.
Full Size Image

Was this review helpful? 0 0

Merchant Response:

Hi Josh, we're sorry to hear about the trouble you had with this third member. Because it was used in a competitive nature such as circle track racing, we're unable to offer a warranty. Our Customer Service Team did offer offer options as a courtesy. Feel free to give us a call at 800.979.0122 if you would like to make use of any of the options given.
Josh Helmick
Verified Reviewer
Fredericksburg va

Garbage

February 17, 2016
Garbage do not buy installed 3rd member at shop pulled it on trailer got home went to back it off and boom took it back out in the driveway and the spool was cracked called about a replace ment and you all tell me it's just a matter of time before they break why sell a product you can't stand behind at least until you get to run it? Costumer support guy wants to sell me another spool to replace it why buy something that they say will break again never got to run it for 5 minutes after I got off the phone I went out to the garage and took it apart only to find a spool covered in surface rust along with rust on the bearing and that's not all the reason it broke is because I could turn the nut that adjusts the backlash with my fingers very poor built product and very poor customer service by the way the reason it broke is because the adjuster nuts weren't tight and the spool was moving side to side but there's nothing they can do about it!!!
No, I would not recommend this product.
Full Size Image

Was this review helpful? 0 0

Merchant Response:

Thank you for your feedback. Due to the application in which this third member is used, we're unable to offer a warranty. When this was brought to our attention, we offered a replacement spool at a heavily discounted rate and outbound shipping paid as a customer goodwill. These third members are assembled in-house here at Speedway, and are subject to several quality checks prior to leaving our facility. We appreciate your feedback. Please let us know if there's anything else we can do to help by giving us a call at 800.979.0122.
Joshua helmick
Verified Reviewer
Fredericksburg va

Pics

February 17, 2016
More pictures of this great product that lasted 5 minutes
No, I would not recommend this product.
Full Size Image

Was this review helpful? 0 0

Merchant Response:

Thank you for your feedback. Due to the application in which this third member is used, we're unable to offer a warranty. When this was brought to our attention, we offered a replacement spool at a heavily discounted rate and outbound shipping paid as a customer goodwill. These third members are assembled in-house here at Speedway, and are subject to several quality checks prior to leaving our facility. We appreciate your feedback. Please let us know if there's anything else we can do to help by giving us a call at 800.979.0122.
33racing
Verified Purchaser

Awsome product

June 16, 2014
They came all set up, drop in and break them in and go racing. It is what my car needed, don't have a lot of time to work on car and they helped me eliminate time that I don't have. Great product, car was faster than it ever has been
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Page 1 of 1

Product Q&A

7 questions : 7 answers

1 answers

Will this work in a mud racing truck

Ford351
July 07, 2014

Will this work in a mud racing truck

Answers

July 08, 2014
EricM
These could possibly be used in a mud truck. Keep in mind that these are built with stock replacement type gears and 31 spline max on the axles. If that strength of parts will hold up in your application then it should be just fine.
1 answers

would this 3rd member be ok for 3000 lb drag car? 3000lb car 454 big block,manuel shift 3 speed auto tranny currently notransbrake but may in future. 1/8th mile track 3,000 stall. 4:56 gears

gimech409
Clay Center, KS 67432, USA
December 11, 2013

would this 3rd member be ok for 3000 lb drag car? 3000lb car 454 big block,manuel shift 3 speed auto tranny currently notransbrake but may in future. 1/8th mile track 3,000 stall. 4:56 gears

Answers

December 12, 2013
EricM
These third members are not intended for dag race applications. They are ok in mild street/strip applications but high power levels, slicks, and especially hard launches (especially trans brake) are not recommended. The ring and pinion used are stock replacement as far as material and strength are concerned. You may want to do some research as far as what type of ring and pinion gears are recommended for your application.
1 answers

is this positraction.

booya
Indiana, USA
October 30, 2012

is this positraction.

Answers

October 31, 2012
Jason
Thisthird member has a full spool designed for circle track racing
1 answers

will this work for a street mustang w/400 H/P just street driving

Dude
Upsidedown ,alaska
January 21, 2011

will this work for a street mustang w/400 H/P just street driving

Answers

January 25, 2011
Ken
The 3rd member you specify has a full spool. It is intended for circle track racing only. It will not work on the street (it’ll chew up your axles very quickly).
1 answers

I am curious if this is a stock third member and what size bearings it uses?

Mike O
Kansas
February 22, 2011

I am curious if this is a stock third member and what size bearings it uses?

Answers

February 25, 2011
Mike
Thanks for your interest in our 9” Ford gear assemblies, the case is a stock 9” Ford and the bearings in the assemblies is dependent upon what spool choice you use. In our racing catalogs we have all the different spool and bearings listed for each application. Thanks for the inquiry.
1 answers

Hi I purchased this third member STD spool with 4.11 gears and did all the break in procedures now when I decelerate is it normal for third member to make a howling whining noise someone told me I might have to shim it.

Steve
Puyallup,WA
May 26, 2015

Hi I purchased this third member STD spool with 4.11 gears and did all the break in procedures now when I decelerate is it normal for third member to make a howling whining noise someone told me I might have to shim it.

Answers

May 28, 2015
Eric
Expert
Some gear sets will have a deceleration whine like you describe. Typically it is due to the way the ring gear and pinion gear mesh together. I have experimented with different pinion depth settings as well as backlash settings when attempting to eliminate this on my own projects and most of the time it is impossible to eliminate the deceleration whine if a gear set has it.
1 answers

What u joint style fits the yoke for the standard assembly?

Al B
Knoxville TN
October 20, 2016

What u joint style fits the yoke for the standard assembly?

Answers

October 21, 2016
Eric
Expert
This third member comes with a random yoke so the U joint for it will depend upon the particular yoke you receive. We do offer a yoke option 91048339 which can be added to your order with the third member so that your third member will have a yoke for a 1310 U joint.
Page 1 of 1

You may also be interested in:

  • 9 Inch Ford Ring & Pinion, 3.50 Gear Ratio
    9 Inch Ford Ring & Pinion, 3.50 Gear Ratio
    View
    (3)
    $164.99
    Compare
  • 9 Inch Ford Ring & Pinion, 6.20 Gear Ratio
    9 Inch Ford Ring & Pinion, 6.20 Gear Ratio
    View
    (0)
    $164.99
    Compare
  • 9 Inch Ford Ring & Pinion, 6.33 Gear Ratio
    9 Inch Ford Ring & Pinion, 6.33 Gear Ratio
    View
    (1)
    $164.99
    Compare
  • All NEW Ford 9 Inch Third Members, Full Spool, 31-Spline
    All NEW Ford 9 Inch Third Members, Full Spool, 31-Spline
    View
    (1)
    $759.99
    Compare
  • Fel-Pro Gaskets P2302 9 Inch Ford Pumpkin Gaskets
    Fel-Pro Gaskets P2302 9 Inch Ford Pumpkin Gaskets
    View
    (6)
    $19.99
    Compare
  • Option - Labor to Lighten 9 Inch Ring & Pinion
    Option - Labor to Lighten 9 Inch Ring & Pinion
    View
    (0)
    $97.99
    Compare
Suggestions