Source for Quick Ratio Boxes? New/Used

MrSony

MrSony

Comic Book Super Hero
Nov 15, 2014
4,423
2,762
113
Des Moines, Iowa
#1
What cars have a bolt in better ratio power box? Not necessarily f41 spec but better than stock. Or part number for new/reman.
 
gnvair

gnvair

Greasemonkey
Sep 1, 2018
230
140
28
Southern New Jersey near Philly
#3
TURNA

TURNA

Geezer
Jul 24, 2009
6,610
8,511
113
Socialist NY
#4
Late Model 12.7:1 quick-ratio gearbox
ID markings YA, WS and HX
Line Thread Size: M18x1.5 and M16x1.5
Number of Mounting Holes: 3, (missing leg H-pattern)
Input Shaft Diameter: ¾-inch
Output Shaft Diameter: 1 ¼-inch
Number of Turns Lock to Lock: 2 ½ - 3

1984-'88 Monte Carlo/Malibu with Z65 suspension
1983-'88 Malibu, El Camino
1982-'92 Camaro except FE1 soft ride suspension
1984-'87 Regal with FE2 or FE3 sport suspension
1983-'84 Hurst/Olds
1985-'87 Cutlass with 5.0 (VIN code 9)
1982-'85 Trans Am
1986-'92 Firebird except FE1 suspension
1986-'87 Grand Prix with FE2 touring or F41 heavy duty suspension


Pre-'76 12.7:1 quick-ratio gearbox
Line Thread Size: 11/16 x 18 and 5/8 x 18
Number of Mounting Holes: 4, (H-pattern)
Input Shaft Diameter: 13/16-inch
Output Shaft Diameter: 1 ¼-inch
Number of Turns Lock to Lock: 2 ½ - 3

1967-'76 Camaro, Firebird
1970-'76 Monte Carlo/Malibu
1964-'76 Chevelle


1977-'79 12.7:1 quick-ratio gearbox
Line Thread Size: 11/16 x 18 and 5/8 x 18
Number of Mounting Holes: 3, (missing leg H-pattern)
Input Shaft Diameter: ¾-inch
Output Shaft Diameter: 1 ¼-inch
Number of Turns Lock to Lock: 2 ½- 3

1977-'79 Camaro, Firebird
1977-'79 Monte Carlo, Malibu
1977-'79 Chevelle


Jeep/S-10 14.0:1 quick ratio gearbox
Line Thread Size: M18x1.5 and M16x1.5
Number of Mounting Holes: 3, (missing leg H-pattern)
Input Shaft Diameter: ¾-inch
Output Shaft Diameter: 1 ¼-inch
Number of Turns Lock to Lock: 3 - 3 ½

1991-'92 Fleetwood
1992-'95 Grand Cherokee
1984-'93 Comanche
1984-'95 Cherokee/Wagoneer
1983-'86 Bonneville
1982-'93 2WD S-10 Blazer and pickup


Weatherhead conversion fittings
(from your local auto parts store)
Part number M41157X6X16 - AN6 male to metric 16 O-ring male
Part number M41157X6X18 AN6 male to metric 18 O-ring male
Part Number 1446 - female inverted flare thread
(5/8-18) to male 16 X 1.5 metric o-ring
Part Number 1447 - female inverted flare thread
(5/8-18) to male 18 X 1.5 metric o-ring
Part Number 1444 - 11/16-18 thread O-ring
Male to 5/8-18 female inverted thread adapter
 
pontiacgp

pontiacgp

Canadian Prime Minister
Mar 31, 2006
24,191
9,405
113
Kitchener, Ontario
#5
make sure the rag joint and all your steering components are in good shape, if there is play a new box won't cure that
 
street sweeper

street sweeper

Greasemonkey
Jun 12, 2017
184
234
43
Central Indiana
#6
anyone happen to have current brands/part numbers?
 
gnvair

gnvair

Greasemonkey
Sep 1, 2018
230
140
28
Southern New Jersey near Philly
#7
You can try Rock Auto for part numbers. For example; Look up 1988 Monte Carlo SS, 1989 Pontiac Trans Am, etc. Just keep in mind non G body boxes will have different internal stops which can cause differences in the turning radius
 
TURNA

TURNA

Geezer
Jul 24, 2009
6,610
8,511
113
Socialist NY
#8
Go to a chain store or internet store like rock auto and put in one of the cars listed.

You want us to install it too?!?!?!?!?!?!
 
street sweeper

street sweeper

Greasemonkey
Jun 12, 2017
184
234
43
Central Indiana
#9
Go to a chain store or internet store like rock auto and put in one of the cars listed.

You want us to install it too?!?!?!?!?!?!
No but it gets tedious having to find gm part numbers and verify that the gm part number is in fact that of a quick ratio box, then finding a replacement part number assuming it is the correct part and there was no error in any of the listings. Because i have done the "just buy it for this vehicle!" and gotten bit in the ass. I just figured maybe somebody had done the swap recently and could pull up an online invoice showing the part number and brand but i apologize for trying to seek redundant verification of part numbers.

Thanks for the assistance!
 
MrSony

MrSony

Comic Book Super Hero
Nov 15, 2014
4,423
2,762
113
Des Moines, Iowa
#10
make sure the rag joint and all your steering components are in good shape, if there is play a new box won't cure that
It's gonna be part of a mass upgrading. Balljoints, bushings, tie rods, jeep shaft, etc.
 
Thread starter Similar threads Forum Replies Date
MrSony General Discussion 16
TURNA General Discussion 18

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