Castrol Transmax High Mileage ATF
Thread Starter
Joined: May 2012
Posts: 438
Likes: 116
From: Arcadia, OK
Car: 1990 Pontiac Firebird Formula
Engine: L31 350 TPI
Transmission: Tremec TKX
Axle/Gears: 3.23 Posi
Castrol Transmax High Mileage ATF
I see that Amazon has this for $4.50/quart ( ) . I need to do a pan drop/filter change (car has 17,000 miles on it and 700R4 has never been serviced, as far as I know). Would this be a good choice? Or just use Penzoil Dexron 3?
Joined: Aug 2009
Posts: 1,972
Likes: 127
From: Los Angeles
Car: 1989 IROC Convertible
Engine: 350 TPI L98
Transmission: WC T5
Axle/Gears: 3.42
Re: Castrol Transmax High Mileage ATF
I went with Mobil 1 ATF on my original 700R4 with 118,000 miles on it. Full flush. Must have used 12 quarts just to get to clean fluid. Works great so far. I am not a big fan of Penzoil.
Re: Castrol Transmax High Mileage ATF
If your transmission oil is in good shape, (looks good, smell ok) leave it alone. Transmission oil can go a 100,000 miles easily, if it stays in good shape. If the oil is burnt, then do a complete change here. DO NOT use one of those machines that flush the transmission. They are known to cause create unnecessary problems. If you want to do this yourself, let me know and I will tell how to do it, a 98% - 99% oil change here.
Thread Starter
Joined: May 2012
Posts: 438
Likes: 116
From: Arcadia, OK
Car: 1990 Pontiac Firebird Formula
Engine: L31 350 TPI
Transmission: Tremec TKX
Axle/Gears: 3.23 Posi
Re: Castrol Transmax High Mileage ATF
If your transmission oil is in good shape, (looks good, smell ok) leave it alone. Transmission oil can go a 100,000 miles easily, if it stays in good shape. If the oil is burnt, then do a complete change here. DO NOT use one of those machines that flush the transmission. They are known to cause create unnecessary problems. If you want to do this yourself, let me know and I will tell how to do it, a 98% - 99% oil change here.
Last edited by rt66er; Oct 1, 2018 at 05:32 PM.
Re: Castrol Transmax High Mileage ATF
Since the oil is fine, just add what you need. Age has nothing to do with anything, the filter will be fine If you have not driven it then, just make sure the TV cable is tight at WOT, and drive it easy for three to four miles to make sure there is no air in anything. Then recheck the oil level and go from there. Changing oil when not needed is not going to improve anything here. If you still want to do a oil change, let me know and I will tell you how to do it.
Joined: Feb 2017
Posts: 4,180
Likes: 574
From: Meriden, CT 06451
Car: 84 TA orig. 305 LG4 "H" E4ME
Engine: 334 SBC - stroked 305 M4ME Q-Jet
Transmission: upgraded 700R4 3200 stall
Axle/Gears: 10bolt 4.10 Posi w Lakewood TA Bars
Re: Castrol Transmax High Mileage ATF
Since the oil is fine, just add what you need. Age has nothing to do with anything, the filter will be fine If you have not driven it then, just make sure the TV cable is tight at WOT, and drive it easy for three to four miles to make sure there is no air in anything. Then recheck the oil level and go from there. Changing oil when not needed is not going to improve anything here. If you still want to do a oil change, let me know and I will tell you how to do it.
You, sir, are an honest person. Maybe one of the very few left. Thank you!
Thread
Thread Starter
Forum
Replies
Last Post
Debritton
History / Originality
9
Aug 10, 2008 12:04 AM
Mikes86SC
Auto Detailing and Appearance
10
Aug 12, 2004 03:17 PM
BLACK Z
Suspension and Chassis
20
Apr 29, 2002 12:35 PM











