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  1. #51
    Join Date
    Mar 2004
    Location
    Clarksburg, Ontario, Canada
    Posts
    530

    Default Re: 4 Speed Owners Must Read!!!!!

    Quote Originally Posted by MPRY1 View Post
    Anyone try Penzoil Syncromesh fluid? Supposedly not GL rated, but has a viscosity near 80W. .
    I (just like Mike, who is the previous owner of my car), also saw the same Penzoil Synchromesh fluid today. I also couldn't find any GL rating, but it says that it provides "excellent synchronizer performance and compatibility with yellow metals, such as bronze, brass and copper components found in manual transaxles and transmissions." Anyone use this?

    I also found Penzoil synthetic GL-4 75w90 gear lube. Which of the two (Synchromesh fluid or the synthetic GL-4) would y'all recommend?

    By the way, I tried at NAPA this morning, and I can't get Sta Lube here in Canada (at least according to the counter-person).

    Thanks in advance for your replies.
    Brad Clarke

    Clarksburg, Ontario

    1972 Buick GS Stage 1 Replica
    455 4-speed

  2. #52
    Join Date
    Jan 2007
    Location
    Ranger Country
    Posts
    4,651

    Default

    Good to hear Jim . I used the Sta- lube at advice of this thread . Worked great .

    DL
    Wouldn't you really rather have a Buick ?

  3. #53
    Join Date
    Apr 2011
    Location
    West Virginia
    Posts
    246

    Default Re: 4 Speed Owners Must Read!!!!!

    Good to hear this helpful update. Thank you for posting, Jim.

  4. #54
    Join Date
    May 2002
    Location
    Central Indiana
    Posts
    1,261

    Default Re: 4 Speed Owners Must Read!!!!!

    Thanks for your update Jim this is great information.
    Davis

    1965 Riviera Gran Sport Super Wildcat
    1968 GS350 with 462, AL Stg 1SE, M20-- 12.23@114.5
    1987 Regal Turbo T LC2 Y56 W02

    BPG #1128, GSCA #2316,

    "I'm out of the Midwest. It was a good place to come from. It give you a sense of right or wrong and fairness, which I think is lacking in our society." ---Steve McQueen

  5. #55
    Join Date
    Jul 2012
    Location
    West Chester, PA
    Posts
    1,441

    Default Re: 4 Speed Owners Must Read!!!!!

    Thread resurrection! How about the Pennzoil Synchromesh? The bottle states that it is equivalent to GM part number 12345349. I tried to see if that GM part number was GL-5 but couldn't get clarification. Here is the info on Pennzoil Synchromesh:

    http://www.pennzoil.com/other-car-pr...mission-fluid/
    Kevin
    1964 Buick Special Deluxe 2 door SOLD
    -350 SBB 4bbl, 4 speed saginaw
    1983 Chevrolet Monte Carlo Drag car SOLD
    1969 Mercury Cougar
    1973 Chevelle SS 350 4 speed

  6. #56
    Join Date
    Mar 2004
    Location
    Boston,MA
    Posts
    3,457

    Default

    Guys I started this thread years ago, this is the cheapest part of your transmission(the fluid) just pony up the extra dollars for the good stuff.
    HERB L.
    BOSTON, MA


    GNX #016
    GNX #132
    1986 WH1
    1984 Grand National
    1974 Apollo GSX
    1971 Stage 1 Auto
    1970 GSX Stage 1 Auto 10-10
    1969 Skylark Convertible
    1965 Riviera Custom
    1965 Riviera GS
    Finishline Built Stage 2 Iron Head Engine

  7. Default Re: 4 Speed Owners Must Read!!!!!

    Quote Originally Posted by Clanceman427 View Post
    Thread resurrection! How about the Pennzoil Synchromesh? The bottle states that it is equivalent to GM part number 12345349. I tried to see if that GM part number was GL-5 but couldn't get clarification. Here is the info on Pennzoil Synchromesh:

    http://www.pennzoil.com/other-car-pr...mission-fluid/
    I found the NAPA store could get/had the Sta Lube GL4
    Deceptively Proficient.

    Ted Nagel
    64 LeSabre Wagon
    65 Wildcat 4-speed
    65 Gran Sport 4-speed
    67 Wildcat
    68 GS 400
    69 GS Stage 1 4-speed
    70 GS Stage 1 4-speed

  8. #58

    Default Re: 4 Speed Owners Must Read!!!!!

    Quote Originally Posted by Aerobatix View Post
    Oh boy!!

    I recently changed fluids in both my Muncie and the rear-end with Valvoline gear oil. Bought it at the local AutoZone. I added the corect GM posi fluid to the rear-end and used it straight in the Muncie. I have about 150 miles on the car since changing fluids.

    I read this post and go out to check the Valvoline bottles and sure enough.....it says GL5 on the rear of the bottle. So, do I simply drain both and refill with a correct GL4 fluid, or do I need to flush each with something?

    I'm thankful for the board and people sharing info as I would have never even thought this could be a problem. I hope I haven't caused any harm with 150-200 miles with the GL5 fluids.

    So, flush or simply refill?

    Thanks!!

    Rob
    You can just drain the GLl5 and replace it with the GL4

    ---------- Post added at 03:16 PM ---------- Previous post was at 03:07 PM ----------

    NAPA Sta-lube GL4

  9. #59
    Join Date
    Jul 2012
    Location
    West Chester, PA
    Posts
    1,441

    Default Re: 4 Speed Owners Must Read!!!!!

    My local NAPA shelves only had GL5's but I asked them to order the Sta Lube GL4. They got Redline full synthetic GL4. As I pumped it into my Saginaw I could hear the synchros saying "aaahhhhh.." in relief. Man that stuff is pricey, $16 per quart. But like you all have stated, well worth it. Can't wait to try it out.
    Kevin
    1964 Buick Special Deluxe 2 door SOLD
    -350 SBB 4bbl, 4 speed saginaw
    1983 Chevrolet Monte Carlo Drag car SOLD
    1969 Mercury Cougar
    1973 Chevelle SS 350 4 speed

  10. #60
    Join Date
    Sep 2014
    Location
    Alabama
    Posts
    1

    Default Re: 4 Speed Owners Must Read!!!!!

    I've been running AMSOIL MTG (GL4) in my Muncie M21 for years. It works great. It's all I use.

    http://www.amsoil.com/shop/by-produc...-EA&zo=2011844

    MTG.jpg


    http://www.amsoil.com/shop/by-produc...-EA&zo=2011844


    Tommy

 

 
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