Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 27th October 2007, 13:20   #16
BHPian
 
Join Date: May 2007
Location: Navi Mumbai
Posts: 184
Thanked: 46 Times
Default

I too face reverse gear problem in my Wagon-R, as frequently as getting heads on flipping a coin. And many Wagon-R users i know also face it.
Yes, best solution is to engage the 1st and then shift to reverse.
anuragn is offline   Reply With Quote
Old 28th October 2007, 03:51   #17
BHPian
 
Venkatesh.C's Avatar
 
Join Date: Sep 2007
Location: Chennai
Posts: 261
Thanked: 30 Times
Default

Quote:
Originally Posted by androdev View Post
I doubt it.. as u know, synchro allows you to shift from one gear to any gear irrespective of the RPM match.. while in motion.. this would mean you will actually be able to shift from top-forward gear to reverse gear and go really fast in reverse :-) but as u are not expected to shift into reverse on the fly (while in motion).. the need for reverse synchro is negligible and a good place to cut costs.

reverse not slotting:
the reverse is a straight-cut gear (spline). meshing spline gears requires 'exact' alignment that's why sometimes reverse doesn't slot in unless u somehow change the gear alignments (inch forward in a forward gear, or coast)
While solutions are aplenty and wide, it would be interesting to know Why this happens. Androdev's answer is perhaps the best bet yet unless someone else has a different perspective.
Venkatesh.C is offline   Reply With Quote
Old 29th October 2007, 11:06   #18
BHPian
 
im_srini's Avatar
 
Join Date: Sep 2006
Location: Portland
Posts: 956
Thanked: 368 Times
Infractions: 0/1 (5)
Default

Hi guys, I'm no expert, but as far as I know, reverse gear is implemented in two ways - one, is for an 'idler' gear which is physically moved between the mainshaft & the layshaft gears. Because the idler gear needs to be slotted in between two other gears, the reverse gears are straight cut (this is also why reverse is also noisier than other gears). If the gears involved in reverse are not aligned correctly, shifting into reverse is not possible. The most common solution is to shift to another gear, thus 'jiggling' the gears, & enabling easier shifting.

In the second method, the reverse idler gear is constantly in mesh between the mainshaft & layshaft gears. In this case, the mainshaft reverse gear would be spinning in the opposite direction of the rest of the gears due to the inclusion of the idler. Shifting into reverse is accomplished like in the forward gears - with the help of a collar. I'm not sure, but in a reverse implementation like this, shifting into reverse would be a problem when reverse is engaged without giving time for the collar gears time to spin to a stop... In a reverse implementation like this, wouldn't a synchro slow down the spinning collar gear, making the shift to reverse easier ?
im_srini is offline   Reply With Quote
Old 30th October 2007, 22:51   #19
BANNED
 
Join Date: Jul 2006
Location: gurgaon/delhi
Posts: 331
Thanked: Once
Default

guys, i own a civic, even civic has syncromesh forward gears and not the reverse gear. but, no problem in engaging reverse. most of the cars i've driven did'nt have a syncro reverse gear like accent, alto, 800. currently driving swift and civic. i've experienced problems in the gears only in swift and not in any other car. but the reverse gear problem in swift has become very frustating.
sanchits is offline   Reply With Quote
Old 30th October 2007, 23:44   #20
BHPian
 
Firebird's Avatar
 
Join Date: Jul 2005
Location: Mumbai / EC1M 3NH
Posts: 470
Thanked: 61 Times
Default

I have a query here, in Palio, there is a reverse gear lock. until u lift it, you will not find the location for reverse.

This I feel somehow works great. In last 1 yr I have not seen any problem in slotting reverse.
i know this is not rocket science. So is it something different.
Firebird is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Unable to engage 2nd, 4th & Reverse Gears! ex-Phoenician Technical Stuff 10 3rd September 2013 18:26
My first Non Non-Stop Travelogue! 3 States, 10 Days Vacation! pulsar56 Travelogues 73 31st May 2009 23:32
Cars priced over 8L should come with mandatory safety gears lalith_ka The Indian Car Scene 15 28th April 2009 10:44
Imported cars for sale ( various makes) CaliforniaKnight Shifting gears 7 17th December 2005 10:17


All times are GMT +5.5. The time now is 09:16.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks