Update - After fabracating the first set of brackets, I wasn't satisfied with the design, but the process helped me with the redesigh. I'm almost done and should get them installed to test within the next couple of days. I'll post the pics when I'm done. Should be by Friday since I'm going out of town for a week Sat. 3/10 and want them for the trip. However, I won't have time to post the details untill I return from the trip. K-Kmceuen,
Please post photos and let us know what you did, and results!
I'm of the opinion that leg numbness is not a seat height issue, but instead the seat base is too short. For taller drivers the front edge of the seat puts pressure on the under side of your thigh cutting off blood. It's like sitting on a top of a block fence. I'm only 6' 0" tall and have noticed this a lot on Toyotas. Maybe they're still designing seats for the short average body size of Asian drivers or maybe marketing wants to keep the seat bases short to visually trick the eye into thinking there's more legroom than really exists.... I really start to fidget my legs. I find my thighs begin to feel fatigued and my right heel begins to go numb. I think if the seat was just 1-2" higher off the floor, it would be a much nicer ride.
Has anyone actually lifted the seats in their 05+ Tacoma? If so, how did you do it? Are you happy with the results?
He's only shimming the front mount bolts. Their highest-stress situation would be in a rapid deceleration scenario; in that case, the driver's body inertia will be controlled by the seat belt, not the seat (or seat mounts, or seat mount bolts). The bolts will be resisting the inertia of the seat's own mass, and anything that was stored behind the seat in an unrestrained manner (like your bowling ball, or your unbelted-buddy, Paul) that slams into the back of the driver's seat. The 1/8" washer stack sounds ok--assuming the bolt still makes full-thread penetration (and with just 1/8" increase, I'd guess it will)-- to me, but I'm not a rocket scientist or automotive crash test engineer. I've had some skewling in traffic accident analysis and basic college physics...all disclaimers applyAny engineers out there?
I'm just wondering how safe it is to lift up the seat with washers. Mounting brackets are curved to fit snugly on the floor so that they arent putting all the stress on the bolts. If the bracket is lifted where there is no snug fit, you are placing all the stress on the bolt. Not a problem just driving around, but if theres impact which results in 40-50 g's (at 30mph supposedly) you are increasing the risk of sheering the bolts.
<snippage of much "sheering" stuff>
If the seats were any higher and you're taller than, say, 5'10", you'll probably be ducking a lot at intersections to see when the light changes. I'm 6'0" and have to duck at times with the stock seat height.BTW, you guys aren't the first to notice the ride-height issue...Consumers Reports noted "low driver's position" as a ding on the Tacoma back in 2005.
I have no problem with the seat height, I'm 5'10". The only problem I have are certain left turns where the pillar seems too be way to thick or not in a very good position.If the seats were any higher and you're taller than, say, 5'10", you'll probably be ducking a lot at intersections to see when the light changes. I'm 6'0" and have to duck at times with the stock seat height.
I just took out one of the front bolts and noticed that the last 1/4 inch of the bolt is smaller diameter than the rest of the bolt and it is threaded. So if I add some washers it seem that the smaller diameter past of the bolt won't be contirbuting to hold the seat in place. Is it possible to buy bolts such as this that are 1/4 inch longer than the existing one? Or maybe that smaller part on the end wasn't meant to touch anything? Does anyone know?Just for kicks, I removed the bolts and wedged 1/2 inch of wood underneath the front mounts on the drivers seat. I sat in the garage for a few minutes to see if it was any more comfortable. It was but then the armrests seemed too low.
I decided to stack 2, 1/16 flat washers under each front mount, and fasten the bracket down.That was all that would squeeze in there without further modification. I probably should put longer bolts in, but I just want to try it for a few days. I sat for about 15 minutes and the 1/8 inch lift actually made a big difference for me! The change in angle of the seat was noticeable.
Keep in mind that the seat rails are not level to the floor. Meaning the farther back the seat is set the lower it is in relation to the floor.
I think the ultimate solution is to remove the rivet holding the rails to the floor mount brackets, place a piece of flat iron in between the two, and carefully weld everything back together. I would like to try 3/8 flat iron under the front, and 1/4 for the back to help the seat angle. This would actually be stronger than the factory setup.
For now, I'll try the washers for a few weeks and let you know what I think.