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Founder, 1929-2014
Speedy Bill
Since 1952
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America's Oldest Speed Shop ®

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Mustang II 2 Inch Dropped Steel Spindles

SAME DAY SHIPPING! Most orders ship within 24 hours.

Specs
Material Type:
Steel
Overall Height:
7.63
Sold in Quantity:
Pair
Finish:
Natural
Shank Length:
4.56
Drop:
2.00
Outer Bearing Surface O.D.:
.88
Inner Bearing Surface O.D.:
1.37
Garage Sale:
No
Notes
Replacement for '74 - '80 Pinto/Bobcat and '74 - '78 Mustang II. Accepts Wilwood brake kits if you drill/tap 1 hole per spindle.
Mustang II 2 Inch Dropped Steel Spindles
Mustang II 2 Inch Dropped Steel Spindles
Mustang II 2 Inch Dropped Steel Spindles

Click image to enlarge

Please NOTE the following about this product:

  • This item is sold as a pair.

Details

Reviews

Q & A

What's in the Box

Our Mustang II spindles are constructed from 1045 heat-treated alloy steel. Retains absolute stock factory geometry and uses all stock rotors, bearings, calipers, etc., making it easy to install.

Note: If using OEM caliper brackets, slight modification of the spindle and/or the caliper bracket is required. (Additional clearance between the spindle and caliper bracket is required.)

910-34304 Instructions (PDF)

 


 

Application

  • 1974-1980 Pinto and Bobcat
  • 1974-1978 Mustang II

Customer Reviews

Rated 4.4 out of 5 by 7 reviewers.
RATING BREAKDOWN
7 reviews
5 Stars
5
4 Stars
1
3 Stars
0
2 Stars
1
1 Star
0
RECOMMEND THIS PRODUCT:

Hawk36
Verified Purchaser
East Coast
Product Rating

Easy installation

October 31, 2014
Very easy installation, recommend you get the Stainless brake lines to go with, stock brake lines will work but they are very tight and will rupture.
Yes, I recommend this product.
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Jccats
Verified Purchaser
Lodi, CA, USA
Product Rating

This product is basically good

August 05, 2014
The spindles are of decent quality and design. But in saying that, I would recommend using Moog K772 ball joint and not an after market ball joint due to the fact that the taper is not as precise as the Moog K772 and travels further into the stud socket which presents a new set of problems. I went through 2 sets before trying Moog which cleared up the problem. Being a machinist by trade I don't think I am talking through my hat.
Yes, I recommend this product.
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MZ
Verified Purchaser
Central Wisconsin
Product Rating

Works for the Shay Model A!

August 16, 2012
We bought these to drop the front on a Shay Model A reproduction. They work perfect even with the stock wheels. You will need longer brake lines so don't forget to order those.
Pros:
  • Quality
  • Improves Handling
  • Good Fit
  • Easy To Install
Yes, I recommend this product.
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33 Chevy owner
Verified Purchaser
Apple Valley, Ca.
Product Rating

As good as advertised.

August 11, 2011
Mustang II suspension installed in 33 Chevy. Very little clearance from rim to grease fitting and car sat high in front. These spindles solved the problem.
Pros:
  • Easy To Install
Yes, I recommend this product.
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jimish
Verified Purchaser
Reedley, CA
Product Rating

Disappointing Quality

December 25, 2011
If you care at all about how a spindle looks, forget this one. It is the roughest casting I have ever come in contact with - there are ridges and depressions exceeding 3/16" - took 4 hours of grinding to get an acceptable looking spindle ready to paint. The price is right if you don't care about looks - but 90% of the time, if one is buying a 2" drop spindle, one cares about looks. Casting is so rough, it makes me wonder about it's structural integrity. We'll find out how strong it is.
No, I would not recommend this product.
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digmo2
Verified Purchaser
billings,montana
Product Rating

nice real nice

January 04, 2011
nice and easy way to lower my ride
Pros:
  • Improves Handling
  • Easy To Install
Yes, I recommend this product.
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zcrw01
Verified Purchaser
Product Rating

Quality product

January 27, 2015
The spindles arrived on time, were in great shape due to the excellent packaging and the way they were protected. The break on the shipping charge was appreciated. The quality of the workmanship was better than expected. I bought a pair a few years ago from another well known supplier and their stuff was junk. Way to go Speedway, for Speedy Bills legacy .
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

8 questions : 10 answers

will these work with TCI mustang 2 kit (total cost involved)

1 answers
wynns55
Bellevue, ID, USA
June 23, 2014

will these work with TCI mustang 2 kit (total cost involved)

Answers

June 24, 2014
EricM
As long as your TCI kit utilizes 74-80 Mustang II spindles then these Speedway dropped spindles should work without any major issues. Depending on what brake kit you are currently running in some cases the caliper bracket and/or spindle may require minor grinding for necessary clearance. The Flex lines to the calipers will also need to be relocated as needed per your application.

Will these work on a Fatman IFS? I have a Fatman ifs and was looking to get a lower stance. I have 11 inch rotors that I would like to reuse.

1 answers
Blueberry
Levittown pa
April 09, 2014

Will these work on a Fatman IFS? I have a Fatman ifs and was looking to get a lower stance. I have 11 inch rotors that I would like to reuse.

Answers

April 10, 2014
EricM
These spindles will work fine for you as long as your Fat Man front end uses stock style '74 to '80 Mustang II spindles. In most cases the brake lines need to be relocated. Also some minor grinding for the caliper brackets is required with some brackets.

I have 11" Granada rotors will these work with the dropped spindles?

1 answers
zcrw
Arizona
December 21, 2013

I have 11" Granada rotors will these work with the dropped spindles?

Answers

December 23, 2013
Jason
If you currently have 11” Granada rotors on your Mustang II front suspension the dropped spindles will accept the same hardware. With the dropped spindles the caliper location is in a slightly different plane and your lines may have to be rerouted or changed.

I bought these spindles, but now need to know what ball joints they call for? Does it call for the standard 1974-1980 Pinto upper/lower Balljoint? 1974-1978 Mustang II will work as well, or no? Also, these are front steer spindles, right, or no?

2 answers
Peepaw
Houston, TX
November 13, 2011

I bought these spindles, but now need to know what ball joints they call for? Does it call for the standard 1974-1980 Pinto upper/lower Balljoint? 1974-1978 Mustang II will work as well, or no? Also, these are front steer spindles, right, or no?

Answers

August 13, 2014
Jccats
Recommend using Moog K772. A little more pricey, but a far better fit than a after market joint.
November 14, 2011
John
Part # 91034304 These spindles will work with the stock 1974-80 Mustang II type ball joints and also with the screw in ball joints number 91034323. If using the aftermarket or screw in style ball joints with tubular control arms you will need to spacer between the spindles and castellated nut to avoid running out of threads and for proper cotter pin alignment.

Will these 2 inch drop spindles fit the 1979 or 1980 pinto suspension and will you have to do the same modification to the stock pinto caliper bracket

1 answers
mike
Mount Washington kentucky
November 01, 2011

Will these 2 inch drop spindles fit the 1979 or 1980 pinto suspension and will you have to do the same modification to the stock pinto caliper bracket

Answers

November 02, 2011
John
Part # 91034304 * These spindles fit 1974-1980 Pinto and Bobcat * 1974-1978 Mustang II The factory brake lines may need to be changed to allow necessary clearance and with possible casting variations between the spindles and the caliper brackets some grinding may be required.

In your note there are modifications required using OEM calipers with drop spindle. What modifications are required to the drop spindle and/or the OEM brake caliper? I have this scenario. I can't mount the rotor with the caliper installed. Thanks.

1 answers
Greg
Beaumont, Texas
July 25, 2011

In your note there are modifications required using OEM calipers with drop spindle. What modifications are required to the drop spindle and/or the OEM brake caliper? I have this scenario. I can't mount the rotor with the caliper installed. Thanks.

Answers

July 26, 2011
John
Speedway’s Mustang II dropped spindles retain stock steering geometry and accept all the stock components. Because of casting variations between OEM and other manufacturers there may be the need for some minor grinding to obtain the necessary clearance between the factory or aftermarket “C” brackets and the spindle. Also, the original brake lines will not work correctly and we suggest number 6178565 as the solution. When assembling the brake components the rotors with bearings and seals are installed first and then the caliper and pads.

IS THERE ANYTHING ELSE YOU NEED TO INSTALL THESE DROP SPINDLES?

1 answers
July 10, 2011

IS THERE ANYTHING ELSE YOU NEED TO INSTALL THESE DROP SPINDLES?

Answers

July 14, 2011
AJohn
"THE OEM PINTO OR MUSTANG II BRAKE LINES WILL INTERFERE WITH THIS SPINDLE. AN AFTER MARKET BRAKE LINE IS REQUIRED. WE SUGGEST 6178565 WHEN USING STOCK MUSTANG II/PINTO CALIPERS. IF USING OEM CALIPER BRACKETS, SLIGHT MODIFICATION OF THE SPINDLE AND/OR THE BRACKET IS REQUIRED. (ADDITIONAL CLEARANCE BETWEENT THE SPINDLE AND CALIPER BRACKET IS REQUIRED.)

is the price per pair or each ?

2 answers
moonman
tulsa oklahoma
July 05, 2011

is the price per pair or each ?

Answers

August 13, 2014
Jccats
Price is for a pair.
July 06, 2011
Jason
These spindles are sold as a pair
Page 1 of 1

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(Part #91031001)
                        

Vented stock 9-1/4" diameter brake rotors for 1974-1980 Mustang II, Pinto, or Bobcat spindles (or Speedway brake kits using '49-'54 Chevy spindles). Brake rotors are new, not plugged or re-drilled. Has a 5 on 4-1/2" bolt pattern with corresponding 1/2" diameter fine thread wheel studs.

  • Outside Diameter of rotor disc - 9.256"
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Mustang II Steel Spindles
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910-34307 Instructions (PDF)

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Spring Rate Chart (Link)

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*NOTE*: See Notes tab for important install information.
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910-31944 Instructions (PDF)

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