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Home > Products > Gear Sets > Low Gear Sets

3-Speed Transmission Low Gear Sets


Gear Sets | Shorty Gears | 3-Speed Low Gear Sets | Reverse Ring Gears

ATI offers Low Gear Sets for most popular 3-speed transmissions. These gears are an excellent alternative to steep rear end gears for street driven performance vehicles and low RPM, high torque race engines.

These low gear sets increase the gear ratio to leave the starting line and go back to the original rear gear in high gear. The Increase is usually equal to 1 numerically higher gear ratio.

All gear sets have weight restrictions. Consult your ATI technician.

High Impact Gears
Shorty Gear Sets
Reverse Ring Gears

Low Gear Set

Ford C4 Low Gear Set
Developed by ATI, this gear set was developed to reduce friction and wear on C-4 equipped race or street cars. Each kit consists of a five-piece gear set that is machined for the roller bearings to replace the factory thrust washers—resultings are lower ETs and extended transmission life.


  Description
Part No.
Price
FORD C4 - 2.46 LOW DRAG GEAR SET
644250
$299.95

Ford C4 6-Pinion Planetary
ATI offers a 6 pinion planetary for the high performance C-4 transmission. Track
experience has proven the 3 pinion style forward planetary to be a weak component in high performance applications. Precision CNC-machined for exacting gear alignment, this heavy duty steel planetary ensures a sizeable increase in load handling characteristics while providing consistent performance. This carrier is also machined to accept a roller bearing assembly or use the original equipment washer.


  Description
Part No.
Price
  FORD C6 6-PINION PLANETARY
644001
$355.00


Turbo 350 - 2.75 Low Gear Set

Low gear sets increase the gear ratio when leaving the starting line and return to the original rear gear in high gear. The increase is usually equal to 1 numerically higher gear ratio. A car with a 4.10 rear gear and a standard low gear of 2.52 equals a 10.33 starting line ratio or SLR (2.52 x 4.1). Utilizing the 2.75 gear set equals a 11.30 SLR (4.1 x 2.75). The new SLR 11.30 divided by the old low gear of 2.52 equals 4.48 - the new rear gear required to obtain the 11.30 SLR with the 2.528 low gear. Great for towing, motor homes, street cars and big CID high torque motors that are RPM
limited and are using a 4.10 rear gear.

  Description
Part No.
Price
  2.75 RATIO
354040
$499.95





T400 aftermarket gear sets require a
special snap ring when used in 1965 to
approximately 1967 case applications.
Turbo 400 - Low Gear Sets
Low gear sets increase the gear ratio when leaving the starting line and return to the original rear gear in high gear. The Increase is usually equal to 1 numerically higher gear ratio. A car with a 4.10 rear gear and a standard low gear of 2.48 equals a 10.16 starting line ratio or SLR (2.48 x 4.1). Utilizing the 2.75 gear set equals a 11.30 SLR (4.1 x 2.75). The new SLR 11.30 divided by the old low gear of 2.48 equals 4.54 - the new rear gear required to obtain the 11.30 SLR with the 2.48 low gear. Great for towing, motor homes, street cars and big CID high torque motors that are RPM limited and are using a 3.73, 3.90 or 4.10 rear gear.

  Description
Carrier
HP
Part #
Price
  2.48 RATIO - OEM STRAIGHT CUT
Installed in OEM carrier
OEM
1500
404030
$895.95
  2.48 OEM STRAIGHT CUT GEARS -
Supplied with new #405810 red-lined band
ALUM
700
404040
$995.95
  2.10 LOW GEAR SET - HELICAL GEARS
STEEL
800
404081
$1395.95
  2.75 LOW GEAR SET - HELICAL GEARS
STEEL
800
404088
$549.00

All gear sets have weight restrictions. Consult your ATI technician.

Turbo 400 - Aluminum Reaction Carrier

  Description
Part No.
Price
  ALUMINUM GEAR SET CARRIER
407070
$450.00




Torqueflite - 2.77 Ratio Low Gear Set

In addition to supplying increased torque for towing and motor homes, these gears are an excellent alternative to steep rear end gears for street driven performance vehicles and low RPM, high torque race engines.


  Description
Part No.
Price
  TF727 2.77
TF904 2.77
724310
904100
$975.00
$398.99
 
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