NEVER use gear oil in a T5!mustang70 said:Would an 89 T-5 take ATF or gear oil? TIA.
Just received my Tremec T5 service manual.BobV said:NEVER say NEVER. 83-84 Non-World Class T5's DO use 70W gear oil. Only WC T5's use ATF.
LINKY
Hack said:Just received my Tremec T5 service manual.
And right above that line it says "Most T5 transmissions use Dextron fluid. Refer to vehicle owner's manual or service manual for specifications". When you go to the 83-84 Mustang 5.0 manual for NON-WORLD CLASS T5, it specifies 70W gear oil.On page 2-1, it says:
DO NOT USE GEAR OIL IN THE T5 TRANSMISSION SINCE THIS MAY DAMAGE THE BLOCKING RING MATERIAL.
It's exactly like that in the manual, caps and all.
Yes I did buy a manual. Good of you to post a link for the pdf version.BobV said:You didn't actually buy a manual, did you? The EXACT same service manual that vendors are "selling" is available for free online at :http://www.tremec.com/English/media/pdfs_autogen/T-5_Service_Manual.pdf
And right above that line it says "Most T5 transmissions use Dextron fluid. Refer to vehicle owner's manual or service manual for specifications". When you go to the 83-84 Mustang 5.0 manual for NON-WORLD CLASS T5, it specifies 70W gear oil.
Yes, I agree, MOST t5's use Dextron, but not all!!! I've actually "been there, done that".
Hack said:Yes I did buy a manual. Good of you to post a link for the pdf version.
The point I was making is that it's not as simple as WC uses Dextron and NWC uses gear oil. According to the manufacturer, gear oil can damage the transmission.
Hmm, interesting that the manual is labeled T5 WC & NWC...83GT289 said:83 84 non WC were not manufactured by Tremec. This makes your tremec manual irrelevant to these models of transmission. Tremec bought the T5 line from borg warner in 98. Yes, it is as simple as non WC T5 trans use gear oil and WC T5's use ATF. Borg warner produced the non WC T5's not Tremec.
J.
took me 10 seconds to find a diagram in the manual - page 7-5, figure 7-9 Assembly of T5 NWC Output Shaft Group. Item 73 - blocking ring.GypsyR said:Try this, non-world class transmissions DON'T HAVE blocker rings. The manual includes blowup pictures of both. Note the carbon fiber rings on the WC but not on the non-WC.