User Tag List

+ Reply to Thread
Results 1 to 15 of 15

Thread: Sierra T5 gearbox overhaul

  1. #1
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Sierra T5 gearbox overhaul

    Need to do a rebuild on my Sierra T5 box, who in the UK can supply a full overhaul kit ie bearings/ seals/ shims / baulk rings and poss 4th gear synchro hub ( got a problem selecting 4th when cold ) there are some basic kits from the likes of Burton, the Gearbox man nothing in stock only option I've found is from the US. So any help would be appreciated.

  2. #2
    Racer Decade Plus User

    Join Date
    Sep 2006
    Location
    chesterfield derbyshire
    Age
    44
    Posts
    2,164
    Thanks
    68
    Thanked 143 Times in 136 Posts

    Re: Sierra T5 gearbox overhaul

    Try sending honkywhitetrash a message. He has parts I think.

  3. #3
    Pit Crew Decade Plus User

    Join Date
    Mar 2008
    Location
    west bromwich
    Posts
    1,772
    Thanks
    3
    Thanked 128 Times in 122 Posts

    Re: Sierra T5 gearbox overhaul

    G.e.a.r.s in southport , Bernie , at cts

  4. #4
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Re: Sierra T5 gearbox overhaul

    Just a bit of info neither GEARS or CTS will supply parts as all their stock is used for their own builds.

  5. #5
    Pit Crew Decade Plus User nickmk11's Avatar

    My 1st Project
    Join Date
    Sep 2004
    Location
    uk kent
    Age
    47
    Posts
    1,332
    Thanks
    0
    Thanked 8 Times in 8 Posts

    Re: Sierra T5 gearbox overhaul

    Give these a shout you may even get 5th gear watch a few of his videos
    http://www.5speeds.com/cart/index.ph...&product_id=52
    https://www.youtube.com/watch?v=piCMtiE2XEE&t=1144s


    MOBILE REMAPPING KENT

  6. #6
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Re: Sierra T5 gearbox overhaul

    Thanks for the replies guys, will let you know when I get the parts sorted and who from. Cheers.

  7. #7
    Racer Decade Plus User

    Join Date
    Jan 2008
    Location
    Up the garage
    Age
    39
    Posts
    2,732
    Thanks
    212
    Thanked 165 Times in 160 Posts

    Re: Sierra T5 gearbox overhaul

    Are you going to cut the rear bearing off to get the box apart or do you have a decent 5th gear puller? Difficult job even with the proper tools!

  8. #8
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Re: Sierra T5 gearbox overhaul

    Would appear to the best to cut the bearing to save destroying 5th gear when you pull them

  9. #9
    Racer Decade Plus User

    Join Date
    Jan 2008
    Location
    Up the garage
    Age
    39
    Posts
    2,732
    Thanks
    212
    Thanked 165 Times in 160 Posts

    Re: Sierra T5 gearbox overhaul

    I had a proper puller made that gets 5th gear off without breaking it - I didn't want to be cutting the rear bearing shell in case the bearing was OK as fitting a new bearing almost certainly means re-shimming the main-shaft. It's not a problem if doing a complete overhaul though.

    It was a bit of an oversight on Borg-Warner's/Cosworth's part.

  10. #10
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Re: Sierra T5 gearbox overhaul

    The main issue I have is selection of 4th gear, it's just solid when cold but does get better once warmed up. But certainly not right. Apart from that the box is ok. Thought while I'm in there May aswell do an overhall because the milage on the box or history is unknown.

  11. #11
    Racer Decade Plus User

    Join Date
    Jan 2008
    Location
    Up the garage
    Age
    39
    Posts
    2,732
    Thanks
    212
    Thanked 165 Times in 160 Posts

    Re: Sierra T5 gearbox overhaul

    Could be expensive if you need a replacement main drive gear and synchroniser assembly! Are you using original ATF oil spec'd by Ford?
    Could be block bars - last box I did had broken block bar ends on 4th gear side.
    Will be a good chance to check end-float while box is apart.
    What BHP you running?
    Last edited by HonkyWhiteTrash; 02-09-2017 at 22:30.

  12. #12
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Re: Sierra T5 gearbox overhaul

    Oil that was in the box looked like ATF, it's only at 280 bhp so nothing ridiculous. But don't know how it's been treated in its previous life. Now fitted in a mk1 cortina so it's not an easy task to remove. ..That's life!

  13. #13
    Racer Decade Plus User

    Join Date
    Jan 2008
    Location
    Up the garage
    Age
    39
    Posts
    2,732
    Thanks
    212
    Thanked 165 Times in 160 Posts

    Re: Sierra T5 gearbox overhaul

    OK, keep us posted.

  14. #14
    Spanner Monkey

    Join Date
    Jan 2016
    Location
    Hull
    Posts
    228
    Thanks
    4
    Thanked 18 Times in 18 Posts

    Re: Sierra T5 gearbox overhaul

    Click image for larger version Name:	image.jpeg Views:	59 Size:	304.1 KB ID:	82004Click image for larger version Name:	image.jpeg Views:	58 Size:	318.8 KB ID:	82005Got round to pulling the box apart, found that the 4th gear blocker bars had ground themselfs into 4th gear synchro ring! Got a overhaul kit coming from America next week

  15. #15
    Pit Crew Decade Plus User

    Join Date
    Nov 2004
    Location
    Sweden
    Posts
    1,116
    Thanks
    3
    Thanked 86 Times in 84 Posts

    Re: Sierra T5 gearbox overhaul

    I have similar shit issues going into second, very hard when cold (especially downshifting).

    I haven't had a T5 apart, can you check synchros by just popping off the lid of the gearbox?

    I am running close to 300 whp and over 400 Nm so really above the T5 limits long term but still would like to figure out what the issues are before I decide what to do.

    Gustaf

+ Reply to Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts