AdamTibbs Posted July 23, 2018 Report Share Posted July 23, 2018 Hi, looking for some advice on a TR4a Diff, there is rotational slack, when turning the prop shaft before the output shafts turn, is this normal? if so how much is acceptable. I was hoping to take the unit out and take it to Mike Papworth for checking, but he is to busy, not available to look at it until November. Thanks in advance Quote Link to post Share on other sites
RogerH Posted July 23, 2018 Report Share Posted July 23, 2018 Hi Adam, mine is recently back from overhaul and has apprx 5mm movement on the periphery of the input/pinion flange Others have slightly less. Where abouts are you in the UK Roger Quote Link to post Share on other sites
AdamTibbs Posted July 23, 2018 Author Report Share Posted July 23, 2018 Hi Roger, South of Birmingham, near Redditch and Solihull Quote Link to post Share on other sites
RogerH Posted July 23, 2018 Report Share Posted July 23, 2018 Hi Adam, a bit further north than ideal. I use a very capable workshop in Leatherhead, Surrey (Hardy Engineering - https://www.hardyengineering.co.uk/) They do good work but you need to specify a time frame. Roger Quote Link to post Share on other sites
rcreweread Posted July 23, 2018 Report Share Posted July 23, 2018 Hi, looking for some advice on a TR4a Diff, there is rotational slack, when turning the prop shaft before the output shafts turn, is this normal? if so how much is acceptable. I was hoping to take the unit out and take it to Mike Papworth for checking, but he is to busy, not available to look at it until November. Thanks in advance Adam - Hi and welcome to the forum. Have sent you a PM ( personal Message) - if you look at the very top of this page on the right hand side, you will see an icon of an envelope and if there is an unread message in your "inbox", there will be a red tag above it - click on the envelope and that will take you into your messages Cheers Rich Quote Link to post Share on other sites
Ian Vincent Posted July 26, 2018 Report Share Posted July 26, 2018 (edited) Hi Adam, I replaced my CW&P over the winter. There should only be between 3 and 6 thou of backlash between the pinion and the CW and there should be none on the planetary gears so in theory the amount of play at the input shaft with both wheels locked should be minimal. (note my car is a TR3a so it has a rigid rear axle). Before I changed the CW&P (for a lower ratio) I had about 5 or 6 mm of free movement at the edge of the pinion connection. Now I have virtually none. Rgds Ian PS With the old CW&P it didn't whine and that has always been my yardstick against which to judge things - does it make a noise, particularly when warm - if it doesn't it's probably OK. Edited July 26, 2018 by Ian Vincent Quote Link to post Share on other sites
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.