Let Me Know if You Have Allison Transmission Fluid Questions

hzjcm8 wrote:

lanerd wrote:
Welcome Tom... my 08 Safari has the C7 CAT and a 3000mh (built in 07) Allison and as I read in an earlier post (and also in my Allison manual), I'm required to change both filters every 36 months and full fluid change every 48 month. When changing the filters, I will lose almost half of the fluid and am required to replace it (of course). When changing the fluid at 48 months, I assume I do not change the filters, but if I don't pull both filters I also assume I will not get the entire 19 qts (4" pan) to drain. I now have 27,000 miles and recently replaced both the filters and the 19 qts of Transynd. It seems strange to me that the filters are only good for 36 months and the fluid for 48. Will it be detrimental to the trans if I change both filters and fluid every 48 months, or should I change both every 36 months? Due to the price of Transynd, I would like to reduce the amount of good (and fresh) Transynd with the replacement of the lost fluid during the filter change.

thanks, and once again welcome.

Ron

Ron,
Are you running Allison Gold Series filters or the High Capacity filters? Or are you running some "aftermarket" filters?

I'm using the high capacity part number 29545779. I purchased the Transynd and filter kit from a certified Allison dealer in Bakersfield CA.

Ron

Ron

I just purchased an 05 Fleetwood Revolution LE Cat 400hp and Allison Transmission. It only has 9200 miles on it. I have no idea what has been done to it as far as mainteance. Any recommendations on what kind of servicing I should have done? Thanks
Brian

lanerd wrote:
Welcome Tom... my 08 Safari has the C7 CAT and a 3000mh (built in 07) Allison and as I read in an earlier post (and also in my Allison manual), I'm required to change both filters every 36 months and full fluid change every 48 month. When changing the filters, I will lose almost half of the fluid and am required to replace it (of course). When changing the fluid at 48 months, I assume I do not change the filters, but if I don't pull both filters I also assume I will not get the entire 19 qts (4" pan) to drain. I now have 27,000 miles and recently replaced both the filters and the 19 qts of Transynd. It seems strange to me that the filters are only good for 36 months and the fluid for 48. Will it be detrimental to the trans if I change both filters and fluid every 48 months, or should I change both every 36 months? Due to the price of Transynd, I would like to reduce the amount of good (and fresh) Transynd with the replacement of the lost fluid during the filter change.

thanks, and once again welcome.

Ron

Ron,
Are you running Allison Gold Series filters or the High Capacity filters? Or are you running some "aftermarket" filters?

slemnah wrote:
Tom, welcome to the forum. Your info is very valuable to all of us. I have a 97 HR Imperial with a 3000 series Allison. I tried to check the fluid level using my touch pad but I guess I don't have that option. Is there a way to upgrade my touch pad for fluid level? Also, does it hurt to continue running Dexron lll or would it be better in the longrun to change over to synthetic? I recently purchased the motorhome and it looks like service's have all been done with Dexron. Thanks again for the help!
Steve

Change to TranSynd (or another TES-295 approved fluid) and run it for 300,000 miles without any more oil changes. You'll have to ask a technician to verify whether or not you have an OLS (Oil Level Sensor) in your sump. If not, then you won't have that functionality on the shift selector pad.

Tom, welcome to the forum. Your info is very valuable to all of us. I have a 97 HR Imperial with a 3000 series Allison. I tried to check the fluid level using my touch pad but I guess I don't have that option. Is there a way to upgrade my touch pad for fluid level? Also, does it hurt to continue running Dexron lll or would it be better in the longrun to change over to synthetic? I recently purchased the motorhome and it looks like service's have all been done with Dexron. Thanks again for the help!
Steve

Mr.Mark wrote:
Hzjcm8, I have a rather unusual question. When we first bought our new coach, I could swear that I had a transmission dip stick, I know I checked it once. Then, when I took it into service for it's first 5,000 mile check up and fluid change, I went to check the dip stick and there was no dip stick, just the locking piece on the end.

When I mentioned it to the service shop, they said that they don't have dip sticks that the level is checked from the transmission pad. Again, I know I'm not crazy as I remember pulling a dip stick once when it was new.

Can I get a dip stick from Allison?

Thanks,
MM.

Mr. Mark,

I asked my old friend (still at Allison) and he said you should have a dipstick. They must have lost it at the service place. Allison supplies the transmission with a short dipstick only. The chassis manufacturer modifies it to fit the engine compartment. They should be able to supply the dipstick through their P/N (not the Allison P/N). So, who's the chassis manufacturer? You could ask them for a replacement.

Hope this helps !!!

Welcome Tom... my 08 Safari has the C7 CAT and a 3000mh (built in 07) Allison and as I read in an earlier post (and also in my Allison manual), I'm required to change both filters every 36 months and full fluid change every 48 month. When changing the filters, I will lose almost half of the fluid and am required to replace it (of course). When changing the fluid at 48 months, I assume I do not change the filters, but if I don't pull both filters I also assume I will not get the entire 19 qts (4" pan) to drain. I now have 27,000 miles and recently replaced both the filters and the 19 qts of Transynd. It seems strange to me that the filters are only good for 36 months and the fluid for 48. Will it be detrimental to the trans if I change both filters and fluid every 48 months, or should I change both every 36 months? Due to the price of Transynd, I would like to reduce the amount of good (and fresh) Transynd with the replacement of the lost fluid during the filter change.

thanks, and once again welcome.

Ron

caymann wrote:
Checking Oil Level (3000/4000) :

When i change transmission oil, before i drain it, i mark my dipstick to where the current cold oil level is with an exacto knife or something. I drain tranny oil cold because it is synthetic and hence flows nicely. Generally this level is far higher than what the dipstick shows as hot/cold mark. You do this once only. After draining oil, i just fill oil upto this newly marked level.

Next time , i am driving and the oil is hot enough (140F or more) and i am on a level surface, i use the allison pad and press up and dn arrow together. It counts down 7..6...1..0 and tells me OL--OK (ie oil level is good)

So i don't have to worry about warming the oil after a fill to check with the tranny pad since the oil is cold at the time and tranny pad would give you the reading.

It has worked for me for many years and i have used this method in 3000 and 4000 series allison transmissions.

Caymann,

Great method. Can't see anything wrong with it. The dynamic sump level (transmission pump running) will seek its own level based on suction (pump inlet) flow rate vs. retun oil flow rate. So, marking it and then returning new oil to that mark should be OK.

Desertcat921 wrote:
I have an MCI bus with allison 740 transmission and assume I can use transynd in it too?

Desertcat921,

Yes. TranSynd is OK for the HT740 series.

Checking Oil Level (3000/4000) :

When i change transmission oil, before i drain it, i mark my dipstick to where the current cold oil level is with an exacto knife or something. I drain tranny oil cold because it is synthetic and hence flows nicely. Generally this level is far higher than what the dipstick shows as hot/cold mark. You do this once only. After draining oil, i just fill oil upto this newly marked level.

Next time , i am driving and the oil is hot enough (140F or more) and i am on a level surface, i use the allison pad and press up and dn arrow together. It counts down 7..6...1..0 and tells me OL--OK (ie oil level is good)

So i don't have to worry about warming the oil after a fill to check with the tranny pad since the oil is cold at the time and tranny pad would give you the reading.

It has worked for me for many years and i have used this method in 3000 and 4000 series allison transmissions.