Drive System Fluid question
 

I recently acquired a GT 2554 which is a hydro and uses the Drive System Fluid (p/n 737-3120) in the tranny. There are no issues with the hydro but because I am unsure of this tractors past maintenance, I plan to change the fluid and filter.

I have not been able to find any specs on the Cub/MTD Drive System Fluid but I did find one chart that gave its equivalent as 10W40 synthetic blend motor oil. I don't plan on using that, but I wondered if HyTran would be a good alternative to the Drive System Fluid.

Any opinions. (p.s. I ask this because I already have an amount of HyTran left over from maintenance on other tractors) Thanks in advance.

I don't believe hytran would be a good substitute.

Why not??? It is a suitable oil for hydrostatic transmissions, both in Cub Cadets and the hydro tractors IH built.

I'd use it.

Could you elaborate why on what you believe?

I ask because around OCC, HyTran seems to be the gold standard and I was looking for any reasons that I should not use it.

Hey Ironman, what kind of transmission is in that tractor? A Hydrogear? If so, here is the link from the BDU models in the newer tractors, all they need is an SJ/CD in 20w50. If hytran fits, then I'd use it.

That is a good question. The parts manual gives a breakdown for the hydrostatic pump and the transmission but they don't say who makes it.

This has the cast iron rear end and the pump bolts on.

It's a Hydrogear. Same basic unit that was on an 1863, which used Hy-Tran.....

Any good synthetic 15-40 or 50W engine oil will work well.

I believe you are correct. I went back and looked at the pump parts breakdown again and noticed all the part numbers start with "HG". Prolly a good chance that stands for Hydro-Gear.

I'd use a cheaper knock off brand for a hydro-gear. Dang hytran is so expensive these days unless you can get it in bulk. I missed the part where you mentioned you already had some extra on hand so my response was useless anyway sorry about that.