Pumps Archives - Transmission Digest
Dynamics of transmission fluid hydraulics and shifting

To understand why using the correct transmission fluid is necessary, you first have to know how the transmission fluid flows inside an automatic transmission.  Fluid paths The journey starts in the pan. The transmission fluid is drawn from the pan through a filter by the pump that is behind the torque converter. The fluid level

GFX announces new pump for Ford 6F35E

GFX has announced a new pump for the Ford 6F35E transmissions. The pump is for generation 2 models and has a snap ring on seal. According to the company, this pump is designed to replace OEM part no. RF9L8P-7A105CB for years 2013 and on.

Shift Pointers: Reassembling GM pumps with cam failure

For the past several years, GM has used a binary positive displacement vane type pump. The compact design allows for it to be utilized in off-axis applications such as the 8L90 transmission and the third generation 6T40 transmission. Figures 1 (above) through 4 display a view of this style pump in the 6T40 applications. The

GFX adds new pump for vintage Powerglide models

GFX announced a new pump component for GM Powerglide models, covering several vintage model years: 1950 through 1973.

How to fix GM 8L45/8L90 no-move and no-pressure conditions

By now you may have heard of, or even experienced, a GM 8L45 or 8L90 transmission with a no-move or no-pressure condition. Conditions of no movement or no pressure after repair have plagued this unit since its inception. Here’s what you can do about them. Condition 1: No movement after fast learn or programming If

GFX introduces variety of new products: Oil pumps, friction plates, bearings and more

GFX recently announced a bevy of new products, from oil pumps to friction plates to bearings to several others. Here’s a roundup of the latest from the company: Ford used oil pump GFX has introduced a used oil pump for Ford transmissions including the 10R80. According to the company, these hard parts are designed to

Comparing the pumps on Ford 6F35 generation 1 and 2

The change For the 2013 model year, the Ford 6F35 transmission received a high-volume pump which increased the intake channel in the stator shaft support from 0.432” to 0.520”. The pump body intake channel was also increased to the same matching dimensions. The reason Higher pump volume was required to accommodate the 1.5-, 1.6- and

GM 10L80: A new kind of pump noise

How quickly time passes by. The GM 10L80/90 transmissions began production in 2017, meaning that we’re closing in on six years of this transmission being on the road. Many who work in the dealerships have become privy to the immediate failures that occur in this unit. And now, with some of these transmissions coming out

Keep an eye out for 6L80/90 defective oil pumps

The complaint After replacing the pump assembly in a 6L80/90 transmission with a new GM pump the vehicle returns with symptoms that would appear to be caused by a low fluid condition: it falls out of gear at a stop and has low line pressure. Upon further inspection the sump filter, which was also a

Transtar introduces 6T40 generation 3 shift kit

Transtar’s TransGo brand has introduced a lube boost valve for 6T40 models from model years 2015 to 2022. According to the company, to salvage the pump, TransGo engineered an oversize hardened steel valve and spring combination to minimize the valve oscillation responsible for premature bore wear, ensuring a lasting fix.

Moroso introduces external oil pump with a fuel pump drive

Moroso has introduced an external, single stage, reverse rotation oil pump with a fuel pump drive. The reverse rotation pump is mounted towards the front of the car and has a driver’s side door car style mounting bracket. It has a spur gear 1.200 pressure section and variable spring rates that can optimize your oil

Watch: What you need to know about pumps and converter hubs

In the latest video from the Transtar Garage Studio, Dave Hritsko, technical parts specialist for Transtar, talks pumps and converter hubs. “Anybody who’s been doing transmissions for a while knows there’s many types of converter hubs,” Hritsko says. The main difference between these types of hubs is that you have two different ways of centering