Midlands95 Posted August 16, 2014 Report Share Posted August 16, 2014 Hi all, new to the forum Just wondering if anyone has carried out the 5th gear modification on their 1.4TDI - basically it involves swapping out the existing 5th gear for a longer gear to reduce the revs which makes for quiter and more economical cruising.Drivers of the 1.4TDI engined models will know that the standard 5th gear is rather short so when cruising at 70mph (or overtaking at higher speeds!) the engine doesn't feel very relaxed revving at 2600rpm+If anyone has carried out this modification I would be very interested in hearing how it's worked out. Apparently, the idea is to make the 5th gear longer but not to make the gap between 4th-5th too long so that you have to keep downshifitng to 4th which would probably make the economy worse.Cheers Quote Link to comment Share on other sites More sharing options...
Kes Posted August 20, 2014 Report Share Posted August 20, 2014 I have it fitted but my turbo went recently so not had a chance to test it properly. Will update soon to let you know. Quote Link to comment Share on other sites More sharing options...
Midlands95 Posted August 26, 2014 Author Report Share Posted August 26, 2014 Thanks, I am getting mine done in around 3 weeks time - getting the current 0.756 changed for 0.658. Bad luck with the turbo, hope it doesn't cost you too much! Quote Link to comment Share on other sites More sharing options...
Midlands95 Posted September 18, 2014 Author Report Share Posted September 18, 2014 Just to keep this updated, I got the .658 gear fitted - 70 is now about 2.1k which feels much more relaxed and a lot quieter. The car has no problem maintaining speed at lower revs. 1 Quote Link to comment Share on other sites More sharing options...
Kes Posted September 18, 2014 Report Share Posted September 18, 2014 Sorry was meant to get back to you. Mine is the exact same with no problems. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 18, 2014 Report Share Posted September 18, 2014 Why not put a 6 speed in? Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 19, 2014 Report Share Posted September 19, 2014 Why not put a 6 speed in?Price. Eurotuning wanted over £1000 without fitting. A new gear is a couple of hundred. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 19, 2014 Report Share Posted September 19, 2014 It's the faffing about pulling it all to bits ain't it, sure a second hand box wouldn't be that pricey. Quote Link to comment Share on other sites More sharing options...
jon_273 Posted September 19, 2014 Report Share Posted September 19, 2014 There is no existing 6 speed box that's a straight fit though. Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 19, 2014 Report Share Posted September 19, 2014 It's the faffing about pulling it all to bits ain't it, sure a second hand box wouldn't be that pricey.as Jon says that's one point 2 it's a direct fit so if you gearbox is being refurbed bung it on then otherwise it can be done whilst on the car. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 19, 2014 Report Share Posted September 19, 2014 Fair enough if your box is being stripped for reconditioning, but if it's just for fitting that other gear it just seems a bit OTT! Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 19, 2014 Report Share Posted September 19, 2014 Fair enough if your box is being stripped for reconditioning, but if it's just for fitting that other gear it just seems a bit OTT!As i said you can do it whilst it's on the car. Hardly a massive job. Plus I'm sure if this was available for petrols they would jump on them. I can remember my sport sitting at 4krpm to do 70. Quote Link to comment Share on other sites More sharing options...
Pete Posted September 19, 2014 Report Share Posted September 19, 2014 Alright tired, calm down, didn't notice you mentioned you could do in with the box in place. Quote Link to comment Share on other sites More sharing options...
Rickpercy87 Posted September 19, 2014 Report Share Posted September 19, 2014 Just to keep this updated, I got the .658 gear fitted - 70 is now about 2.1k which feels much more relaxed and a lot quieter. The car has no problem maintaining speed at lower revs.I'm sure mine is at 2000rpm @ 70mph standard. Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 19, 2014 Report Share Posted September 19, 2014 Alright tired, calm down, didn't notice you mentioned you could do in with the box in place.Who is getting ruffled here? I was just reiterating just incase you didn't read it. Wasn't being arsey just trying to get some info across. I'm sure mine is at 2000rpm @ 70mph standard. You must have a different gear then. The arosa with EXB 02j geatbox will do 70mph at around 2.4-2.5krpm depending on wheel size. Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 24, 2014 Report Share Posted September 24, 2014 (edited) Got my 0.658 gear fitted, Perfect for me. Sits about 2.1krpm at 70 on the speedo and 2,3krpm at 120kmh or gps indicated 70, I do alot of b road driving/commuting so the slightly higher rpm for me was worth it over the 0.622 gear which is like 2.1krpm at 80mph. The revs dropped too low to drive without feeling labored with the 0.622. Edited September 24, 2014 by Dblock Quote Link to comment Share on other sites More sharing options...
Midlands95 Posted September 27, 2014 Author Report Share Posted September 27, 2014 (edited) Glad to hear it worked out for you Long motorway journeys are so much quieter now, I've yet to check the difference in MPG though but I fear it won't be such an accurate comparison because the longer gearing means I've been going a bit faster than I would have done with the shorter 5th in!Ps. done some reading on remaps and I'm looking to get one done next year at insurance renewal time. Edited September 27, 2014 by Midlands95 Quote Link to comment Share on other sites More sharing options...
Skezza Posted September 27, 2014 Report Share Posted September 27, 2014 I wonder if a long 5th mod would work on an sdi.... Quote Link to comment Share on other sites More sharing options...
Dblock Posted September 27, 2014 Report Share Posted September 27, 2014 I wonder if a long 5th mod would work on an sdi....I dont think you have the 02j gearbox. Also would it work in general as we are lowering 70mph to 2-2.2k thats a. so it's spinning less for better mpg and comfort but b. it's smack bang in the torque band. You would have to see what it's like in an sdi as if it's out of the torque band it might be worse on fuel and a slug to drive. Quote Link to comment Share on other sites More sharing options...
Daniel1110 Posted November 24, 2020 Report Share Posted November 24, 2020 Hello, working 5th mod on 02t gearbox? I have fabia pd70 and 5th gear is short beacause when I go 140kmh the rpm is 3450k. Thx for answer . Quote Link to comment Share on other sites More sharing options...
ObjectiveAway Posted November 24, 2020 Report Share Posted November 24, 2020 (edited) On 11/24/2020 at 2:34 PM, Daniel1110 said:  5th gear is short beacause when I go 140kmh the rpm is 3450k. The fact you have high rpm's on 140km/h not always means only 5th gear is short - if the final drive is short, whole your gearbox will be short and 5th gear replacement will not help much. You have 02T gearbox, you must write down gearbox identification letters, because there are a lot of 02T gearbox modifications. You can check some of the modifications and ratios of 02T gearboxes on this website. 37:50 is longest 5th gear I have noticed on 085 and 02T gearboxes. Edited November 26, 2020 by ObjectiveAway Quote Link to comment Share on other sites More sharing options...
Daniel1110 Posted December 18, 2020 Report Share Posted December 18, 2020 I have HCS gearbox. What i need to change on my 02t transmission? Or replace full gearbox? Quote Link to comment Share on other sites More sharing options...
Daniel1110 Posted December 19, 2020 Report Share Posted December 19, 2020 I found ewt gearbox from fabia 1.9 tdi same model of fabia than my but i dont know if fit to 1.4 tdi. This ewt gearbox have drive shafts down mounth gearbox and starter. Thx for answers. Quote Link to comment Share on other sites More sharing options...
ObjectiveAway Posted December 21, 2020 Report Share Posted December 21, 2020 (edited) On 12/18/2020 at 11:07 PM, Daniel1110 said: I have HCS gearbox. What i need to change on my 02t transmission? Or replace full gearbox? EWT gearbox has 2,210 reduction, but HCS gearbox has 216mm clutch plate and 90mm flanges instead of 228mm clutch plate and 100mm tripod flanges on EWT gearbox, therefore they are totally not plug and play replacement. HCS have 37:50 5th gear sprockets and makes 2.672 reduction in top gear, which is around 2,5k RPMs on 60mph. There actually are one 085 gearbox with 36:51 sporckets, but I don't think this modification will give you much result for a lot of effort, if you will manage to get those sprockets on your gearbox. Edited December 21, 2020 by ObjectiveAway Quote Link to comment Share on other sites More sharing options...
tchouki85 Posted August 7, 2022 Report Share Posted August 7, 2022 hello to all, where are you on this subject? has anyone managed to put a sixth gear on this type of engine Quote Link to comment Share on other sites More sharing options...
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.