Pump Gear Question

[Jeremy_29]

I have no flow at all in my A4LD and I was going to check the pump gears. What do I look for to tell if it needs replacing??????

 

[BrooklynBay]

When you said that you have no flow, how did you determine this? Did you disconnect the transmission cooler line or did you connect a 0 - 300 PSI gauge to the rear pressure test port?

 

[Jeremy_29]

well i didnt have a pressure gauge but i disconnected the upper line into the cooler and there was no flow even when in gear and i was giving it gas.

 

[BrooklynBay]

The upper line is the return line. The pressure line is on the bottom. Either the cooler is blocked or you have a bad pump. Check the links in # 52 in my list of useful threads for more information.

 

[Jeremy_29]

Ok I am on my second trans and they both did the same thing nothing. Suppose the lines are not clogged what else could it be

 

[BrooklynBay]

I think that you should connect a pressure gauge to the rear port to get a more accurate diagnosis. Check the links in # 10 in my list of useful threads for more information.

 

[Jeremy_29]

Ok I can do that but lets assume that there is little or no pressure what then. This is the second trans ive put in and both with the same results the pump cant be bad on both of them what are the odds of that

 

[BrooklynBay]

That's why I suggested that it might be a clogged cooler, but lets not assume anything without testing it first.

 

[Jeremy_29]

which is cheaper to buy a rebuilt one or to get the original rebuilt??

 

[BrooklynBay]

Either way it should be similar in price. You could rebuild it yourself for a lot less.

 

[Jeremy_29]

thank you, do you know what they might will do if i take it too a shop at this point

 

[BrooklynBay]

Unfortunately, most shops don't troubleshoot what a possible problem might be. They usually push for another rebuild. It's like throwing parts at a problem instead of determining what the exact problem is.

 

[Jeremy_29]

well i know there isint any flow in the trans because when i filled it then started it ran it then checked the fluid the fluid level didnt change like the fluid is just sitting in the pan not circulating through the transmission